CNBTR 2" Dia Groove Rigid Caster Wheel 45# Steel for Industrial Machines Carts 300KG *Solid Quality Roller Steel Wheel, Should Last Long Long Time*: Made of high quality 45# steel make the caster heavy duty of max-load 300kg(660lbs), fine finishedwater proofcorrosion resistance, high strength, good toughness, low creep, abrasion resistance and chemical stability, durable to use. *Size of this item*:Wheel Diameter: 49mm/1.93", Axis Diameter: 10mm/0.39", Groove Width: 19mm/0.75" , Groove Depth: 10mm/0.39" *No Noise and Smooth As Silk *:Unlike other groove wheel, V Groove fits inverted tracks perfectly and can ease the vibration, no noise and smooth as silk.Design add a thick bracket on the guide wheel with 4 screw holes. *Widely Use, Gives Greater Flexibility and Better Use of Available Floor Space*: Suitable for power/rolling dog/baby gates, industrial carts, assembly fixtures, containers, racks, and other equipment and projects *Complete Installation Within Minutes*:These pulleys can be bolted on or welded on, just take wheel out and installed it .