1. Made of safe Material and No trace No drill and keep your storage box beautiful. 2. Perfect for bookshelves, shoe bins, toy bins, underbed storage, shopping carts. 3. If storage box has caster wheel, you will be very easy to move them when change house or doing cleaning. 4. Let Storage Box be Moving: The casters can be pasted on bottom of storage box, the sorting box and garbage can, making them move more labor-saving and convenient. 5. No trace No drill and Keep Beautiful:By using these adhesive caster, it 't damage , no trace, no drill and Do not affect beauty of storage box. Easy to install and Use:Simply peel film on back, firmly press onto smooth , suggest to wait for 24 hour that will be better when using. Colour: White Material: ABS Size: 4.7 x 2.4 x 1.8cm Package Contents: 4 x non-rotating casters Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.