We stock a wide range of caps for your pipe post, unistrut and threaded rod installations. Post Caps are Galvanized steel. They come in a variety of sizes to fit the most common pipes used. Related products: Waveguide bridge / Ice Bridge Kits, waveguide bridge grating, P1200 3-1/2" o.d. series pipe, P1000 2-3/8" o.d. series pipe, P1500 4-1/2" o.d. series pipe. waveguide support brackets or horseheads, P8810KT pipe shoes and trap