Replacement gas inlet valve for W.E. and W.E. compatible gas rifle and pistol magazines. Broken or leaky magazines can ruin a game and regular maintenance is always recommended to prevent this misery. The replacement inlet valve is an easy way to resurrect a dead or leaky mag and can be installed in seconds. Just remember to prevent further leaking and maintain a good seal, always keep a small amount of gas or a maintenance gas in you magazine when being stored.