Best Value
Deckorators
Deckorators 4X4 Newport High Pyramid Fence Cedar Post Cap - Rot Resistant, Made with Cedar, for Outdoor Fences, Mailboxes & Decks
GreenLighting
GreenLighting 4x4 Aluminum Pyramid Post Cap Cover for Nominal Wood Posts (Black, 8 Pack)
H.B. Fuller
Fast 2K Fence Post Mix | Expanding Foam Concrete Alternative for Deck Post, Fence Post, Mailbox, & Playground Equipment Installs. Fast-Setting, Post Foam
GKOLED
GKOLED 6-Pack 4" x 4" Pyramid White PVC Vinyl Post Top Caps (Only for Vinyl Post with Actual Size of 4" x 4", Not for Wood Posts), Suitable for Fences, lamp, Deck, Mailbox Posts