【Ultra Heavy Duty Casters】This extra heavy duty wheel is a high-quality Phenolic fill with Macerated denim.High Temperature Resistance Caster: This caster have a high resistance to impact damage while providing protection for floors in commercial and industrial settings. The heavy duty caster has the characteristics of super high temperature resistance, Temperature: -50 F to + 250 F. 【Caster Size】Industrial caster diameter: 8 inches, width: 2 inches. Plate size: Top plate 4"x4-1/2", mounting over heights 9-1/2", One caster wheel Load capacity is 3000lb, set of 4 load Capacity will be 12000lb.It is almost the largest load-bearing 2-inch wide wheels and can do most of the work on wheels. 【Smooth and No Marking】The caster wheels are equipped with roller bearing, providing a smooth, quiet and no marking experience on different road surfaces. Phenolic wheels perform best on slippery surfaces. We highly recommend these heavy-duty casters for use in clean, dry environments such as warehouses, garages, buildings, retail stores, and anywhere you have clean, dry floors. 【Adaptable to Various Uses】These casters are adaptable to different environments and conditions, resistant to most chemicals, oils, acids, greases and water, providing reliable performance even in extreme industrial environm 【Widely Used】Our casters in this series are suitable for extreme heavy-duty use, with load capacities up to 10,000 lbs. Ideal for manufacturing plants, traction lines, and where tight push/pull forces are required, such as large industrial equipment, institutional machinery, large flatbed carts, material handling equipment, laboratory equipment, hospital equipment office equipment, mobile carts, and utility and maintenance carts. Kingpinless Plate Casters