4″ Solid Elastomer Wheel With 1/2″ Precision Sealed Ball Bearing 2-5/16″ Hub 1000Lbs Capacity W-404-PSE Easy Rolling, Shock Absorbing and Extremely Quiet No Flat Spotting Resistant to wide range of chemicals
4″ Solid Elastomer Wheel With 3/8″ Precision Sealed Ball Bearing 1-3/4″ Hub 600Lbs Capacity W-74-PSE Easy Rolling, Shock Absorbing and Extremely Quiet No Flat Spotting Resistant to wide range of chemicals