Thermoplastic Rubber Casters：Thermoplastic wheels have a synthetic soft rubber tread bonded to a polyolefin core. These soft rubber wheels are floor safe and non-marking. They are smooth and quiet, absorb shock and have superior impact resistance.This smooth rolling and quiet rubber wheel is resistant to oil, grease, water, and most solvents. Heavy Duty Accessories Design: Industrial caster wheel 6 inch diameter, 2 inch width, top plate: 4"x 4-1/2", caster overall height: 7-1/2", with ¾” roller bearing,and ½" ID spanner bushing with Zerk Axle .Galvanized thickened yoke has strong load-bearing capacity, so you can buy and use with confidence. High Load Capacity:These casters were designed with strength and sturdiness in mind for a long lifespan and easy movement of large, heavy loads. Each caster holds up to a maximum of 600 lbs. or 2400 lbs when purchasing a set of 4 casters. Widely Used:This attractive wheel accommodates a large number of industries and a limitless number of applications. Performance Wheels are extremely resilient and easily rolls over debris and uneven surfaces. They are very popular in institutional, food service, retail display, hospitals, schools, restaurants and all types of industrial and manufacturing environments including factories, warehouses and shop floors. WHAT YOU GET: Provide professional industrial caster solutions, in addition, Provide Axle & nuts, yoke and wheel replacement severice any time. GRAY THERMO RUBBER (NON MARKING) WHEEL