Tactical Crusader Silicone Oil, 0.5-Ounce Highly Concentrated Silicone Oil for use with Airsoft Guns Made in the USA Used to properly maintain and lubricant airsoft guns; Great for all moving parts and/or for cleaning Place 1-3 drops of Silicone Lubricant into propane tank valve; Do this approx. every 3-5 mag fills Do not consume, avoid contact with eyes