(.300”) eHigh Base Pad. Great “cost effectivei” way to build a 10 rnd (126mm) Dawson Mag to fit a 2011 Staccato P with a Magwell AND have enough to grab if the mag doesn’t drop free Vs. spending well over $100 on an MBX (140mm) limited 10 mag. Simple install. High quality finished aluminum with weight to assist the magazine to drop free. Awesome product!