Side Bumper for 3/8 Inch Sliding Doors (MSDBUMPER38) Black colored bumper for 3/8" frameless sliding doors is used in vertical wall jambs to receive and stop the door. Includes fastening screw. Unique design receives even misaligned glass and steadies the door to a secure, aligned stop. Prevents closed door from rattling. Note: This part only fits within 1 5/8" width interior jambs and will not fit all brands. No returns.