This Magazine is For Use in High Standard 22-LR Pistols. They feature a 10 Round Capacity, Blue Steel Mag Body and Base Plate. It is Made in The USA, and Comes With a Lifetime Warranty through Triple K Manufacturing. Magazine has a Plastic Follower. This magazine will work in the following handguns: Sport King Model I and II, Lightweight and Field King, Supermatic and Trophy and "GB" models. Specific state laws prohibit the sale and shipment of this magazine; we CANNOT sell or ship to California, Maryland, Hawaii, Massachusetts, New York, and New Jersey.