... design *robotically welded no rivet Service cartName:utility cart,multi-purpose trolley, mobile can racks,2 tier lanudry cartModel ... . YH-SS522specifications:1,bototically welded(no rivets)2,universal welding cart with heavy-duty steel construction3,heavy-duty wheels,4 pcs 4 ... "5,Loading Qty of one 40' container:535PCS steel service cart