This Magazine is constructed of heavy-duty polymer for greater durability and resilience. It's made to fit your GlockA(R) 21, 30, 21SF, 30SF or 30S. .45 ACP caliber 26 rounds Black polymer construction Fits the 21, 21SF, 30, 30S, 30FS Greater durability and resilience New condition Black finish PLEASE NOTE: Magazine texture may vary (sorry, no choice). Order today!