peel off the adhesive backing and attach the wheels to the bottom of your storage boxes, furniture, or appliances. Ideal for use in homes, offices, and workshops, these casters offer a convenient way to enhance the mobility of your items, making organization and relocation a breeze. Features -Color:Black -Material:Plastic, stainless steel -Size:5.30X5.30X2.30cm/2.08X2.08X0.90in -Effortless attachment: the selfadhesive feature allows for easy attachment, eliminating the need for drilling or additional tools -Weight capacity: designed to handle heavy loads, these wheels provide reliable support for your heaviest items -High durability: constructed from , wearresistant materials, these wheels ensure performance - operation: the silent design minimizes noise, making it ideal for use in quiet environments -Versatile 8pack: the 8piece set is Suit for outfitting multiple boxes, offering a versatile and solution Package list: 4 x Steel ball pulley casters 4 x Plastic ball pulley casters