50 x 50 Perfect Steerable Transfer Carth Q-100-0112. 50 x 50 Perfect Steerable Transfer Carth (1260 mm x 1260 mm) tugger cart with flat deck for containers sized 48 x 40 Perfect Steerable Transfer Carthes or 48 x 48 Perfect Steerable Transfer Carthes. This industrial tugger train cart is equipped with a drop pin tow bar and removable handlebar developed by FlexQube. The cart is designed with a floor brake. Get a quote.