This is a Extended Sig Sauer P365 20 Round magazine chambered in 9mm.
Featuring durable steel construction with grip-extending polymer baseplates and rugged internal springs, these 20-round extended magazines transform your P365 pistol from a concealable micro subcompact into a practical combat pistol.
Features and Specifications:
Capacity: 20 Rounds
Material: Heat Treated Steel DuPont Zytel Polymer Follower, Lock-Plate, And Base Plate Heat Treated Chrome Silicone Wire.
Fits: Sig Sauer P365