3M(TM) Bumpon(TM) Blister Pack SJ5312 Clear, 0.500 in x 0.140 in, 18 blisters per case 56 Bumpons per blister Bumpon(TM) Blister Packs SJ5312 is a clear, polyurethane, adhesive backed bumper, cylindrical shape, 0.500 inches (12.7 mm) wide by 0.140 inches (3.6 mm) high. Bumpon(TM) Blister Packs are individually packed pads of the most popular Bumpon(TM) Protective Product shapes. These protective products are pressure-sensitive self-adhering polyurethane bumpers, that can be used as feet, stops, spacers and protectors in many applications.