• Information about size and package: includes 4 mini wheels with a mounting plate diameter of 40 mm, mounting hole diameter of 4 mm, and total height of 20 mm. • Each swivel wheel comes with 4 screws and 1 adhesive pad for easy installation. • Solid material: made of high-quality ABS material and integrated stainless steel ball for a sturdy and durable design. • Each wheel can support up to 35 pounds, with a total weight capacity of 420 pounds for the 12 wheels. • Easy installation: install the swivel wheels on the feet/legs of your furniture with the included adhesive pads or screws. • Strong adhesive stickers provide exceptional and strong adhesion, ensuring the wheels do not fall off easily. • For heavy objects, we recommend using screws to install the swivel wheels. • Low-profile design: low-profile wheels do not add too much height to the furniture and yet can support a good amount of weight. • The larger steel ball in the center of the ABS bracket rolls more smoothly compared to other small balls. • Wide use: swivel wheels can be widely used for furniture, PCs, storage containers, filing cabinets, nightstands, under-bed storage drawers, toolboxes, air purifiers, and other appliances.