Controller for the Invacare Pronto M71 with SureStep (Used) (1106820) Golden Alero (GP50) Constructed with extra strong p aramid K38 4660 Constructed with extra strong p aramid cord reinforcement and engineered fiber loaded neoprene compounding this belt delivers the "muscle" and durability demanded by today’s high performance engines and the high performance enthusiasts who drive them All condition tread features vertical knobs strategically placed in the center and shoulder pairs with square outer knobs This is a gently used control module for older versions of the Invacare Pronto M71 that utilized the MKIV RII joystick and controller system so we recommend you compare your current unit prior to ordering