Evike All Purpose Silicone Lubricant Oil Spray For Airsoft Firearm - 50ml Small (Hand Sized) Can - (44040) Capacity: 50ml Application: For General Airsoft Maintenance and lubrication for Gears, Seals, O-Rings, Plastic Parts, and more For ALL Airsoft guns and real-steel hand guns; Prevent Jamming and reduce wear and tear and enables smooth operation Enhance your gun's performance, longevity, accuracy, and bb feeding; Inflate air seal o-rings on valves with dried o-ring. Check for defective o-ring and air leakage For AEG & GBB: Spray into magazine bb chamber periodically to prevent dust build-up == For Valves: Spray into gas-in and gas-out valves to check for leakage and to inflate the dried o-ring seal to prevent mag air leaks == Silicon oils are used by technicians all over the world to test gas leakage, o-rings and valves == For Gas Blowback: It is a MUST that you lubricate your gun and keep it oiled for quality performance == There are many internal assemblies that may not work properly when dried --- Free Shipping at checkout! Just make sure you're buying from Evike Inc.