Caster Kit, Includes (4) 4" diameter expanding stem, Fits 1-5/8" OD tubing, non-marking polyolefin tread, top lock brake, 300 Lb. capacity, resistant to chemicals and solvents, double ball bearing, operational temp range -45º To 180º F, zinc plated. Applications include: Work Tables, Bakery Equipment, Food Service Operations, Displays, Maintenance Carts, Office Equipment. About Us: BK Resources: a leading supplier of Stainless Steel products, plumbing supplies, commercial gas hoses, and refrigeration. They strive to develop products that are built to last, save time, increase efficiency and offer value to the end user. BK Resources products can be found in leading restaurants, bars and night clubs, universities, stadiums and food trucks nationwide.