This sweep is made from clear extruded vinyl. It easily mounts to the bottom of swinging panels. Helps to prevent water from leaking onto your floor. The 2 Tee’s at the top are 5/32 inch & 3/16 inch. If the shower door needs the 5/32 inch Tee, just insert into the channel. If the door needs the 3/16 inch Tee, cut the 5/32 inch Tee off.