WPerfect Steerable Transfer Carth (BTC-WPerfect Steerable Transfer CartH) The BHS WPerfect Steerable Transfer Carth Model Battery Transfer Carriage has an adjustment height of 5.5” to 23.5” (140 mm to 597 mm) and is available in two roller widths. The WPerfect Steerable Transfer Carth model features spark-proof poly rollers,Perfect 6” (152 mm) phenolic casters, and is