Fits 4x4 (3 5/8) Fence Posts: AMAATE black plastic fence pole cap measure 3 5/8 inches by 3 5/8 inches inside with a 1/2 inch edge height and will fit most fence posts perfectly. Robust and beautiful Materials: Made of plastic our fence post caps are UV resistant, heat resistant, impact resistant and waterproof, and can withstand extreme weather changes without fading or cracking. Protection Wooden Fence Posts: Fence post caps can protect your wooden fence it safe from possible damage caused by sunlight, ice, water, etc. and extends the life of fence posts, protects against cracking and weathering. Easy installation: Each 4x4 black post cap comes with two screws, you only need to drill holes in the wood, then screw the two screws into the wood post through the small holes on both sides of the post cap. Very easy installation Fashion Ornamental: 4x4 post caps to dress up your fence, mailbox, deck, lamp post, dock and piling posts. With their sleek and timeless appeal, these fence post caps will definitely add a stylish touch to your homes exterior. Colour: Black Material: plastic Package Contents: 16 x Fence Post Caps