Single-stack, 9-round magazine is made from heat-treated 17-7 stainless steel to stand up to the demands of competitive and defensive shooting. Precision-formed body is built to very close tolerances for excellent, universal fit. Metal follower ensures reliable feeding and slide stop operation. Extra-power Wolff spring resists "spring set." Removable base pad, spring, and follower allow fast, easy cleaning. Mfg: Wilson Combat SPECS: 17-7 Stainless steel, bright finish, with metal follower and base pad. Fits single-stack 1911 Auto chambered in 10mm. Capacity: 9-rounds.