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.

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.

Price

$39.98Save 20%

Reference price: ~~$49.99~~

Price checked: Nov 13, 2026

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Often bought together

SUNLU PLA 3D Printer Filament, Black, 1KG | PLA Filament 1.75mm, Smooth Printing, Neatly Wound, +/-0.02mm Accuracy, Compatible with Most FDM 3D Printers

$13.99

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

$43.34

Pros and cons

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.

Technical specifications

10 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

What to know before buying

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.

Who is it for?

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.

SUNLU PLA Filament Refill, 1.75 mm, Black, 4 kg · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 338 ratings

5 stars84%84%
4 stars5%5%
3 stars2%2%
2 stars2%2%
1 star7%7%

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.