Stile side shower door seal

This is a black flexible fin that fits in a t-slot in the shower door stile, not the door.  The T is about 3/32 inches width, the seal is about 1/2" wide. This is on a fiberglass shower stall.  The glass is frameless.  This seals against the door side when the door is closed.  It fits into an aluminum extrusion and slides down the stile, interrupted by the magnet, so it is two lengths of about 32" each. Thanks in advance