... gray(3) Bearing: Ball, roller, nylon or without bearing(4) Type: Solid, pneumatic, PU foam, semi-pneumatic, hollow etc.(5) Material ... welding machine etc.(8) Package: In bulk, weave bags , wood pallet, and also in accordance with your requirement( 9 ) ... size : 200x50, 2.50-4, 2.50-8, 3.00-4, 3.50-4, 4.10/3.50-4, 3.00-8, 3 ... 50-8, 4.00-4, 4.00-6, 4.00-8, 4.80/4.00-8, 5.00-6, 6.50-8 Rubber Wheel 14*4 solid