# SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg

SUNLU PLA filament refill is a 4 kg black refill in 1.75 mm diameter for compatible reusable spools. It is not ready to mount by itself, so buyers need an empty SUNLU or Bambu Lab reusable spool before printing.

- [Original product page](https://best-deals.pro/product/sunlu-pla-filament-refill-black-175mm-4kg)
- [View offer](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- Market: US
- Language: en-US
- Currency: USD
- Brand: SUNLU
- Category: Computers > Computer Accessories > Printing Supplies
- Price: 39.98 USD
- Previous price: 49.99 USD
- Discount: 20%
- Price checked: 2026-11-13T05:38:36.898Z
- Rating: 4.6 / 5
- Reviews: 338

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The refill must be fitted to an empty reusable spool before use. The listing names SUNLU and Bambu Lab spools.
- Four black refill units are represented by the 4 kg total listing and four-count specification.
- The manufacturer suggests PLA settings of 210-240℃ nozzle, 50-65°C bed and 100-200mm/s speed.
- Vacuum-sealed packaging with desiccant and neatly wound coils are manufacturer claims.

## Pros

- Refill format lets owners reuse compatible spools rather than use a new spool with each refill.
- Listed 1.75 mm diameter and recommended print settings provide useful setup guidance.
- The listing claims dimensional accuracy of +/- 0.02 mm.

## Cons

- Cannot be used directly without a compatible empty reusable spool.

## Specifications

### Identity
- Brand: SUNLU
### Material and dimensions
- Filament material: PLA
- Color: 4000g Pla Black+black+black+black
- Filament diameter: 1.75 millimeters
- Weight listed: 4 kg
### Printing guidance
- Recommended nozzle temperature: 210-240℃
- Recommended bed temperature: 50-65°C
- Recommended printing speed: 100-200mm/s
### Product details
- Manufacturer part number: SLUS-PLA-BK+BK+BK+BK-1KG\*4-N
- Warranty description: 30-day

## Before you buy

- The listing describes the product as a 4 kg, four-count refill and its part number specifies 1KG\*4. Customer feedback is mixed on fit with standard spools and on winding, so confirm spool compatibility and expect that fit or coil quality may vary.

## A good fit for

- 3D printer owners who already have compatible SUNLU or Bambu Lab reusable spools.
- Buyers seeking a multi-unit supply of black PLA refill filament.

## Less suited to

- Buyers who need a ready-to-use filament spool or do not have a compatible reusable spool.

## Customer feedback

Customer feedback generally praises print quality and consistent color, with reports of clean finishes and good results on Bambu P1S printers. Other feedback describes tangles that can lead to clogs, along with mixed spool winding and fit, including reports that some standard spools do not fit. These issues matter particularly because this refill requires a reusable spool, and matching the intended spool is essential before use. Aggregate ratings are favorable overall but include a smaller one-star share, so they do not establish uniformly positive experiences.
- Positive themes: Customers report good filament quality, clean finishes and consistent color between spools.
- Negative themes: Some customers report fit problems with standard spools and issues with refillability.
- Mixed feedback: Feedback on tangling and winding is mixed. Some report smooth feeding while others mention tangles, clogging or poor winding.

## Frequently asked questions

### Can this refill be used without a spool?
No. The listing says it needs to be installed on an empty reusable SUNLU or Bambu Lab spool before use.
### What print settings does SUNLU recommend?
The listed guidance is 210-240℃ nozzle temperature, 50-65°C bed temperature and 100-200mm/s speed. Printer-specific results may vary.
### How much filament is listed?
The details specify 4 kg and a unit count of four. The part number also indicates 1KG\*4.

## Alternative options

- [SUNLU PLA Refill Filament 1.75mm 4KG, Black\*4 \| 3D Printer Filament Refill PLA Plus, No-Spool PLA+ Filament Bundles for Reusable Spools Compatible with Bambu Labs Filament](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [SUNLU PLA+2.0 3D Printer Filament Refill 1.75mm, 4KG, 1KG/Roll, Black\*4 \| High Toughness PLA+ Filament Bundle, No Spool Refill for Reusable Spools, Compatible with Bambu Lab 3D Printers, Black\*4](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [OVERTURE 4 Pack 1kg High Speed Refill PLA+ Filament, Black\*4 \| Upgraded Rapid PLA 2.0 with Enhanced Toughness & Stability, 1kg \(2.2lb\) Refilament for Bambu Lab, Fit Most FDM 3D Printers](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [DEEPLEE PLA Basic Refill Filament 1.75mm, 4KG Black \| No Spool 3D Printer Filament, Dimensional Accuracy +/- 0.02mm, Fits for Most FDM 3D Printers](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [ELEGOO PLA Basic Refill 3D Printer Filament 1.75mm Black 4KG \| 3D Printer Filament No Spool, Dimensional Accuracy +/- 0.02mm, 3D Printing PLA for Reusable Spool Refilling](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [SUNLU PLA+2.0 3D Printer Filament Refill 1.75mm, 4 Packs, 4KG \| Stronger PLA+ Filament, No Spool Refill, Compatible with Bambu Lab 3D Printers, White+Green+Klein Blue+Red](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [ELEGOO Rapid PLA Plus 3D Printer Filament 1.75mm Black 4KG \| 30-600mm/s High Speed Printing; Smooth Flow; Low Warp; +/-0.02mm Accuracy; for FDM 3D Printers; 4 x 1kg\(2.2lb\)](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [AMOLEN PLA 3D Printer Filament 1.75mm Fossil Gradient Stone 1KG \| Gradient Stone Texture, Natural Stone-Like Finish,Smooth Printing, Fit Most FDM 3D Printers, Dimensional Accuracy +/- 0.02mm](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [Inslogic Pre-Dried Black PLA Pro Filament 4KG, Tough Plus, 4 Pack Bundle \| Reliable output, smooth paths, ±0.02mm, fits Bambu, 3D printers, No drying needed, reusable packaging](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [MarsWork PLA Filament 1.75mm PLA 3D Printer Filament\(Refill\),1kg Refill for Reusable Spools\(2.2lbs\),Premium Quality 3D Printing Filament for Bambu lab 3D Printers,Purple](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
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- [PLA Basic Refill Filament 1.75mm, 1KG White \| No Spool 3D Printer Filament, Dimensi...](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)

## Add-ons

- [SUNLU PLA 3D Printer Filament, Black, 1KG \| PLA Filament 1.75mm, Smooth Printing, Neatly Wound, +/-0.02mm Accuracy, Compatible with Most FDM 3D Printers](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)
- [SUNLU PLA+2.0 3D Printer Filament, Black, 4-Pack \(4KG\) \| Upgraded PLA+ Filament 1.75mm, Tougher & Stronger, Neatly Wound, +/-0.02mm Accuracy, Individually Vacuum Packed](https://best-deals.pro/visit/sunlu-pla-filament-refill-black-175mm-4kg)

## Images

![SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg — 1](https://best-deals.pro/i/5OZ2Uf0i2V-rdbwfkEgvfIqdEPz7nsO22GaB-Drydi_gnNbJQJW4cpkKF6MnqTe03-6AxDpZeXUqefgG9KWRrlO04NM9YzOd1mEyUnvpcMI4hhqjWRkX87vA.jpg)

![SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg — 2](https://best-deals.pro/i/o5rFXEgMxwr6zWIPQeCmSRLpzeTa1j8yMOT-Ajz_uy7ujiC_gj_ioudyaJTwduls5KVbA3Kdo9JJ0tMT5cfuNvLNGDyi1dpoZTBeGbs58rlIvJeJ8413Er3V.jpg)

![SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg — 3](https://best-deals.pro/i/7AwxMv_d_s_ZE48w1jKVoBhKu-ITKdXNOfQNFy-9cu4qGPxXnzp_a2_5hyyt7-kShB6ZyzZffQXAb7r7ABKDzYMFWVdN-l2yTtvuAiNIjeark2Bnxo7gCZOI.jpg)

![SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg — 4](https://best-deals.pro/i/e0Pk1bJKfkPSgihjhl5PSFvG9PLsauLEWdwfnnWZnSbcDCpS0f6QJBL9ZUCJXIoBRtnx0sU3PVVZ6LyuxGHnMRPY6PEdBpyjf7YVDTm29X4Mr0JIGFksjy6Y.jpg)

![SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg — 5](https://best-deals.pro/i/iDvCfMr3KPjYrDr2b7Fd0pnk-tp_Yb1Rk6Qhp09ksWynofNhUHSRMELiFM_A5uWWgSgQGA1uSh10igvWS_a2vJMSG2zLNS_d0cyD75ayuKzE7unehBluprng.jpg)

![SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg — 6](https://best-deals.pro/i/-6hyqQ_EY43qldcmaXYeORIlxS63fevTOOJJPT6Iyt4ZLTsNuB3qbZLEvFESIbGkewEL0j9hHprlb3IXr5lxFf6uGsQuoFXJMUUUEot0tWp43Gh5_BYVsbX4.jpg)

![SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg — 7](https://best-deals.pro/i/yzlj8GUA0txwKTY9qXhs7xg870cHaPcnMSc0VnThufC8PyhADmTG9k4daklvn2l26w2QPA_pNRhvmISKP_LR8i9bXF5jqJBpAMTrdHRdMi4LSjLiA8B-wm52.jpg)