Crystal Lube Syringe 28gms / 1oz Oxygen Grease 28gm of Flouro-Ultra O2 grease in a handy syringe for accurate no waste application. For use when servicing cylinder valves- valve manifolds- first stage and second stage regulators that are O2 clean and intended for use with Nitrox. Valves and regulators for diving use should only be assembled- serviced and maintained by trained and approved service personnel. Apply extremely sparingly to clean and dry components and always replace the cap after use.