A must for proper airgun maintenance, RWS Chamber Lube is a high-quality non-petroleum oil recommended by Umarex USA gunsmiths and service techs and is specially formulated for use in keeping your airgun power-plant operating smoothly. Also good for pivot points and other moving parts as well as rust protection on metals. Useful for just about any application where a non-petroleum based oil is called for. For use with CO2 gun and pneumatic pump guns. This airgun oil prevents your airguns from rusting and the seals from drying out. See and follow the maintenance recommendations in your gun's owner's operation manual before using.