SIEDiNLAR SD806W-36PK 6x6 White ABS Post Caps, 36-Pack

SIEDiNLAR SD806W-36PK post caps are a 36-pack of white, square ABS covers for compatible nominal 6x6 wood or vinyl posts. The listing describes screw-in installation and weather-resistant material, but its fit wording and dimensions should be checked against your posts before ordering.

At a glance

The listing says these caps suit nominal 6x6 wood posts measuring 5.5 x 5.5 inches actual and 6x6 vinyl posts measuring 6.05 x 6.05 inches actual.
The feature description says each cap has 2 pre-drilled holes and stainless steel screws.
The listing claims UV resistance and protection against sun, rain, snow, and wind.

Price

$24.99Save 50%

Reference price: ~~$49.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

A 36-cap pack is suited to projects covering multiple posts.
White matte ABS offers a consistent, understated finish across a fence or deck.
Claimed screw-in fastening and pre-drilled holes offer a straightforward installation approach.

Technical specifications

11 specifications

Identity
Brand	SIEDiNLAR
Model	SD806W-36PK

Size and finish
Pack size	6x6in, 36 Pack
Color	White
Style	Classic
Finish	Matte
Form factor	Square

Dimensions and installation
Dimensions listed	6.48 x 6.48 x 1.38 inches
Weight listed	7.5 pounds
Installation method	Screw-In

Materials and protection
Material listed	ABS

What to know before buying

Listing details to confirm

The listing is inconsistent about fit: it calls the caps 6x6, also describes them as 5x5 covers, and gives actual compatible post sizes as 5.5 x 5.5 inches for wood and 6.05 x 6.05 inches for vinyl. It also says posts measuring 6.5 x 6.5 inches and 7 x 7 inches are incompatible. Confirm your post's actual dimensions and the selected listing before buying. The listed product dimensions are 6.48 x 6.48 x 1.38 inches, and the stainless steel screws are claimed in feature text but not confirmed in a supplied package inventory.

Who is it for?

A good fit for

People covering multiple nominal 6x6 wood or vinyl posts whose actual dimensions match the stated compatibility details.
Fence, deck, railing, or porch projects needing white square post covers.

Less suited to

Posts measuring 6.5 x 6.5 inches or 7 x 7 inches, which the listing says are incompatible.
Buyers who need a confirmed package inventory or verified outdoor durability rather than manufacturer claims.

SIEDiNLAR SD806W-36PK 6x6 White ABS Post Caps, 36-Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 296 ratings

5 stars74%74%
4 stars12%12%
3 stars5%5%
2 stars2%2%
1 star7%7%

Customer feedback describes the caps as attractive, easy to install, and a good fit and value, with positive mentions of quality and appearance. That feedback may be useful for buyers finishing several posts, but it does not resolve the listing's inconsistent fit wording. Ratings are mostly five-star, with a smaller spread across lower star levels, so experiences are not uniformly positive.

Positive themes

Customers praise the appearance and reported ease of installation.
Feedback describes good fit and value.

Frequently asked questions

What post sizes does the listing say these caps fit?

It lists nominal 6x6 wood posts with actual dimensions of 5.5 x 5.5 inches and 6x6 vinyl posts with actual dimensions of 6.05 x 6.05 inches. The listing also says 6.5 x 6.5-inch and 7 x 7-inch posts are incompatible. Measure your post before ordering.

Are screws included?

The feature text claims each cap includes stainless steel screws and has 2 pre-drilled holes, but no explicit package inventory is provided to confirm the kit contents.

What material are the caps made from?

The listing identifies the material as ABS and claims it is UV-resistant. Outdoor performance is a manufacturer claim, not an independently verified result.

How many caps are in the pack?

The listed size is 6x6in, 36 Pack.