Features 1、Metal Ball: The mini wheel adopts metal ball, sturdy roller, great wear proof performance, strong bearing force, can easily move heavy objects. 2、Paste Installation: Strong adhesive design, easy to install. Just stick the universal wheel to the bottom of the box and pull it out gently. 3、360 Degree Rotation: 360 degree rotating ball type universal wheel, no punching design, no noise when using, free movement with no limitation. 4、Easy Access: The pulley is suitable for various storage boxes, which can be transformed into a mobile car, easy access to the bed and other small space. 5、Wide Use: The mini wheels are not only suitable for trash cans, flower pots, storage boxes, but also the perfect DIY accessories for children's toys, handicrafts, small project design, etc. Specifications Item Type: Self Adhesive Castor Wheels Material: Plastic, metal Weight: Approx. 150g/5.3oz Package List 4 x Self Adhesive Castor Wheels