Product Description: Popular OEM Quality Mixer Truck Reducer PMB7.1R120 Gearbox for Concrete Mixer Truck Repair The PMB7.1R120 planetary gearbox is a heavy-duty reducer designed for concrete mixer trucks. It delivers high torque, excellent transmission efficiency, and long service life under demanding working conditions. Manufactured with precision-machined gears and high-strength bearings, it ensures reliable operation even during continuous heavy-load mixing. Our PMB7.1R120