Strong Load Capacity: This mini caster is made of high-strength ABS, which can withstand the weight of most household appliances and various storage boxes. Stable Bonding: The strong adhesive back sticker is stable, sturdy, reliable and durable, does not need to be punched and does not damage any objects. Smooth Gliding: Smooth surfaces of wheels and rollers, no scratches, no noise, and double pulleys have better balance. Portable and Compact: Small casters do not take up too much space in the home; the hidden roller makes your items look cleaner and more beautiful. Versatile Use: This self-adhesive furniture pulley can be used for storage boxes, trash cans, small furniture and also for handmade home improvement products. Colour: Black Size: 4.2*2*1.7 cm Quantity delivered:8 pieces