"The Vestil air hydraulic cart features 2-speed foot pump and a handheld reciprocating air/oil power to raise the platform. Utilize the foot pump for minor height adjustments and the factory air/oil power for effortless lifting. 6in. x 2in. casters Platform, frame, handle, caster rigs, and hardware are all stainless steel Pump assembly, hydraulic cylinder, and scissor legs are zinc plated Wheels are poly-on-poly and casters are poly-on-steel Rugged steel construction frame with durable powder-coated finish"