4PCS Storage Box Pulley Storage Box Pulley Adhesive Pulley Storage Box Can Stick SPECIFICATION: MATERIALS:Plastic ABS PRODUCT WEIGHT:30G BEARING WEIGHT: 8KG MAIN FEATURES: DURABLE Made of high-quality ABS and materials, wear-resistant and durable, has a long-term possession, service life, and 8 kg load-bearing capacity. EASY TO INSTALL Adhesive design, installed on the bottom box, no complicated process. BEST QUALITY Caster rotation and precision ball bearings in the shaft make rolling easier. The internal bearing of the wheelchair foot rolls quickly, the surface is smooth, and it will not be jammed by crumbs, hair, and sand, and you will enjoy smooth and quiet movement. NO NOISE AND SCRATCHES With unlimited durability and high shock absorption. These spare casters allow you to roll smoothly and quietly without making harsh noises, and ensure that you dont scratch or leave marks on any surface. USAGE SCENARIOS Scope of use: The wheels are suitable for different types of storage boxes, making it easier to move. PACKAGE CONTENTS: 4PCS Storage Box Pulley NOTE: Due to manual measurements, please allow slight measurement deviations. Due to the different display and lighting effects, the actual color of the item may be slightly different from the color displayed on the picture.