Self assembly required with mesh diamond pattern base and drop down sides and ends choice of pneumatic tyred or puncture proof wheels 385767dq2 comes with a removable plastic tray insert and clip that holds handle in place when not in use 399642dq2 comes with a ply base and clip that holds handle in place when not in use 399689dq2 comes with puncture proof wheels comes with removable plastic tray instert and clip that holds handle in place when not in use