VentSaver P-383 Snow Guard Vent Pipe Stack and Chimney Protector The 383 series will fit any roof pitch and an infinite array of sizes from 1" to 14" around. Also provided are stainless steel nuts, bolts and heavy duty 1 1/2" lag screws for attaching base to 1 1/2" of structural wood. Protects a standing profile of 9". Installation is quick and easy. Cuts through snow and ice like a shark fin through water!