? FEATURES ? ? Made of high quality ABS materials, wear-resistant and durable, has a long-term possession. ? Adhesive design, installed on the bottom box, no complicated process. ? Caster rotation and precision ball bearings in the shaft make rolling easier. ? These spare casters allow you to roll smoothly and quietly without making harsh noises, and ensure that you don’t scratch or leave marks on any surface. ? After pasting this product on the bottom of the storage box, please leave it for 24 hours before use. ? Adhesive Pulley only, other accessories demo in the picture is not included. ? SPECIFICATION ? ? MATERIAL - Plastic+ ABS ? SIZE - 1.8inch x 0.9inch x 0.6inch( 4.8 x 2.2 x 1.6 cm) ? COLOR - White ? LOAD LIMITED - 8kg ? PIECES - 4pcs ? MOUNTING TYPE - Storage Box Mounting ? SELF ADHESIVE ? WALL MOUNTING ? ADHESIVE TYPE - Self Adhesive ? FEATURES - Furniture Caster ? PACKAGE INCLUDED - 4pcs of Caster Wheel