Rim Strip Grey PVC strip designed to secure and seal glass or plastic sheet into beam T-slots. Beams can be used to frame sheets and create enclosure/guard panels.,Strips XC will accept 4 to 5mm material.Strips XF and XD will accept 3mm material.,See stock nos. 681-659 for 5mm polycarbonate sheet, and 681-637 for 3mm polycarbonate sheet.