The Table Shox Self-Adjusting Glides are great for any table. The Glides use hydraulic leveling to adjust to the correct level. The Glides have a 400 lb. capacity making them a great choice for any and all tables. The Glides are constructed out of steel, polyurethane and non skid/impact resistant nylon. The Glides can automatically adjust up to 5/16 in. to correct and level a table. The Glides are versatile, able to be used on any floor and can be used both indoors and outdoors. The Glides are extremely easy to install, no tools are required. Perfect for restaurants, cafes and cafeterias. - Steel/plastic - Capacity 400 lb - Diameter 1-1/2 in - Sold per pack; 4 per pack