Description: 1. Ball-type sticking pulley: It can be rotated 360 degrees at will, sliding without limitation, and easy to use. 2. Adhesive design: Strong adhesion, firm adhesion, not easy to fall off, rest assured to use. 3. Material: Made of plastic + stainless steel beads, stainless steel has high hardness and wear resistance. 4. Universal type: It is suitable for various storage boxes and has a wide range of applications. 5. Two styles: 8 pieces of casters or 16 pieces of casters are available, with adhesive stickers. Specification: Product name: Castor Wheel color: White Material: ABS, stainless steel (beads) Size: About 45*28mm/1.77*1.10 inches (L*W) Pcs: 8pcs, 16pcs The package includes: 8Pcs * Castor Wheel 8Pcs * Adhesive stickers Or 16Pcs * Castor Wheel 16Pcs * Adhesive stickers Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.