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The sleek and understated Flat Pyramid Post Cap by Fortress Accents adds a premium detail to your classic Al13 Pro rail system. Made with rugged, powder-coated aluminum, this distinctive cap is designed to perfectly fit over the 3 inch x 3 inch posts.

Enhance your deck even more with Fortress Accents lighting accessories! Light as many or as few sides as you wish with Fortress Accents LED Cap Light Module or provide a warm glow around your post using Accents LED Glow Ring for Post Caps. Lighting components are sold separately.

Available in coordinating Fortress finishes: Gloss Black, Gloss White, and textured Black Sand.

Unsure about your size? Measure your posts carefully and use our Post Cap Diagram to understand critical dimensions and ensure a proper fit.


DecksDirect # 5465-1

Fortress Warranty (245 KB) 

AL13 Pro Rail Installation (1024 KB) 

FinishesGloss Black, Gloss White, and Black Sand
Pack SizeEach
Material Type

Powder coated aluminum

Post Cap Opening Size3-1/16 in
(width x depth x height)

4-1/4 in x 4-1/4 in x 1-1/2 in

Inset Measurement1/2 in
Package Contents(1) post cap, (2) set screws, and (1) allen wrench
WarrantyView Fortress Warranty Information
OtherOptional LED Cap Light Module by Fortress Accents available to light this un-lit cap.

Complete Your Project

Flat Pyramid Low Voltage LED Post Cap Light Kit By FortressAccents™
Starting at: $92.99
FortressAccents™ LED Post Cap Light Module - Full Cap Light Kit Package Contents
Starting at: $21.99 $21.99
Low Voltage LED Post Cap Glow Ring by FortressAccents™
Starting at: $61.59 $87.99
Strong aluminum posts attach directly to your deck surface
Starting at: $93.74 $124.99
AL13 Aluminum Universal Rail Bracket by Fortress - Standard - Gloss Black
Starting at: $69.74 $92.99

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