Casters, different manufacturers are not the same model, I had used to Guangzhou Conghua emerging casters, for example, carrying more than 40kg, wheel diameter (mm) - Wheel Width (mm) - bearer (kg) 1-A Series ( Plastic Rubber): 75-25-40 100-30-55 125-37-70 2-B series (PP / PVC): 75-30-40 100-30-55 3-C series (plus hard rubber): 50-33-50 88-33-100 100-33-120 125-33-120 3-D series (plus hard rubber): 75-33-90 4-D series (cast iron rubber): 100-50-2005 -D series (iron + polyurethane): 150-64-1000 6-D series (iron + polyurethane): custom processing: Yes Material: Polyolefin directional: directional casters Specifications: 4-inch thickness: 51mm Scope: All Industries Model: Heavy Series Uses: Industrial Caster diameter: 100mm Maximum load: 225kg Brand: Colson total height: 143mm bracket: double odds double track arc-shaped design of industrial casters 6 inches, is the weight and flexible guarantee. 6mm thick bracket and wheel load lifetime guarantee. Wheels: Tread imported polyurethane material with high mechanical strength, abrasion resistance, shock absorption, and other functions; wheel lock core using a new design principle, so tread and wheel core more consistent; guaranteed under load rated polyurethane ah not unglued, not damaged. Double ball bearing durable, flexible and easy. Appearance: maroon wheels with galvanized bracket. Colson is one of the classic style of the brand. Range: suitable for use on a variety of ground, can be used in a variety of industries industrial casters manufacturers, use temperature -43 ~ 85 degrees wheel surface hardness of Shore 50D-60D load: 4 inch -8 inch single wheel load To 270KG-410kg. Style: Single round super pole synthetic rubber, polyolefin, high-tech polyurethane, polyurethane aluminum pericardium industrial casters, industrial casters modified nylon 4-inch, cast iron, the United States of wheel. Brake way: metal side brake, nylon full brake. 4-inch industrial casters | industrial casters | Custer Custer provided by Shenzhen Logistics Equipment Co. Shenzhen Custer Logistics Equipment Co. (www.szcaster.com) strong, credible, in Shenzhen, Guangdong electronics, electrical products and other manufacturing equipment industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement and innovative ideas will lead you hand into the brilliant Custer, a better future!