Spray Nozzle Removable Threaded Brass, Optional Mist Nozzle Non-Removable Plastic
Spray Arms Aluminum, Optional Brass Aluminum Only
Spray Arm Nuts Brass Plastic
Impeller Tee Brass Plastic
Impeller Shaft Brass Plastic
Drive Gear Steel Plastic
Drive System Single Nylon Gear, Optional Steel Gear Complex Mechanism of 9 Plastic Gears
Drive Principle High Torque from Drive Wheel Tread Low Torque from Axle
Drive Wheels Cast Iron Plastic
Wheel Retainers Quarter-inch Set Screws Pressure Metal Caps
Front Wheel Cast Iron Plastic
Major Components All Steel, Except Nylon Drive Gear (Steel Available) and Hose Assembly Nearly All Plastic