Manufacturer suggested retail price. $18.85 Pneumatic Tool Oilier Features and Benefits: Automatically lubricates air tools as they are being used. Ends tool burn out, stops rust and increases torque. Use on all 3/8" and 1/2" air impact guns, air wrenches, body shop air tool and pneumatic hammers. 1/4" NPT Female inlet x 1/4" NPT Male outlet. Manufacturer: SG Tool Aid Lifetime warranty does not cover abuse