It is designed to fit on the corners of 3" fence posts

vinyl is rust resistant and built to withstand the elements

A 4” Cape May cap will slide over the top of a 4” x 4” post

this 3" corner adapter improves structural support and promotes a longer

or if you want extra support

6" x 6" x 3/8" Galvanized Plate Black Vinyl Chain Link It is designed to fitInstalling chain link fencing onto concrete surfaces requires a special mounting accessory. This is the accessory to which the bottom of the fence post can be welded and then secured to the floor with special bolts or screws. This 6" x 6" x 3 8" Galvanized Plate is designed for such a purpose. Once an individual fence post has been welded to the plate, you can secure the plate to the concrete with screws or bolts, installed through four pre drilled