6 inches 5 inches Cast Iron Rigid Top Plate Extra Heavy Duty Swivel 8 inches Solid Stem Medium Duty Foam PU Hollow Rivet TPR 3 inches 4 inches 3-1/2 inches Rubber Total Lock Threaded Stem Elastic Rubber PA PP Directional Lock Gray Rubber Twin Wheel TPU Dual Pedal Plastic Fork PU Heavy Duty Heat Resistant Side Lock 1-1/2 inches 2 inches Light Duty Transparent Anti Static TPR Conductive TPR Pneumatic 10 inches Wrap Around Special Stem EN1004 EN840