Product Name: 4 Inch to 6 Inch TPE TPR Swivel Casters with Roller Bearing Model NO.: 600PS-150050R-92 Thickness: 50mm Diameter: 150mm Specification: 6inch Maximum Load: 430kg Brand: Wanda Surface Treatment: Zinc Plated Bearing Type: Roller Bearing Brake: With Brake Wheel Material: Rubber Type: Rotating Wheel Cast Iron: Rubber on Cast Iron Cheaper Caster: V-Groove Caster Polyurethane Caster: Polypropylene Caster Phenolic Caster: Mold on Rubber Caster Elastic Rubber Caster: Mold on Polyurethane Casters Round Tread PU Caster: Blue Elastic Rubber Caster Thermoplastic Rubber Caster: TPU Caster Trademark: WANDA Transport Package: Carton Box Specification: SGS Origin: Jiangsu, China HS Code: 87169000 Product Description Introduction:Grey thermoplastic rubber (TPR) castes the performance tpr wheel is specially engineered to provide unsurpassed durability and reliability. this premium wheel combines the durability of a hard tread wheel with the quiet floor protection of a soft tread wheel. straight roller bearing with drilled hardened steel spanner bushing and plastic side washers. 1/2" diameter hollow axle with recessed zerk fitting on straight roller bearing with lock nut for quick easy wheel replacement.