Antifreeze agent for your airsoft gas magazine to minimize the freezing effect from rapid fire Allows gas magazines to remain effective to temperatures as low as -76 Degrees F/-60 Degrees C To apply, hold down the release valve of an empty mag. Apply a few drops through the output valve before filling magazine with gas Easy to use and a must-have for any one using gas blowback airsoft gunsSpecifications: Brand Aim Top Compatibility Gas Powered Airsoft Guns Color Blue 1X Solution Vial