All Style Industries 3-1/2 inch All Style Medium Retro-Split Storm Collar for Pipe Size 3-1/2 inch Diameter (4.00 inch O.D.) Pipe

Retro-Split EPDM rubber storm collars install from the side forming a protective weatherproof umbrella over difficult geometric penetrations passing through a roof. Medium size Retro-Split rubber storm collars include a wraparound skirt, a top plug and a stainless-steel marine grade band clamp which form a weatherproof umbrella counterflashing over the top of a roof flashing jack. Retro-Split rubber storm collars weatherproof process piping and irregular structural steel support columns with profiles that fit within a 6-inch diameter circle. Retro-Split collars open and install from the side. The patented top-plug and push lock skirt surround round, angle, square or any other geometric roof penetration or structural support. Retro-Split collars are made from E.P.D.M. rubber and are resistant to heat, ozone and acid rain to assure long life exceeding 20-years.