The Springfield Echelon 20-round extended magazine is engineered with precision for reliable performance featuring stainless steel construction and an OD Green polymer basepad for tactical applications.Springfield Echelon 9mm Magazine - 20 Round CapacityStainless steel construction with corrosion resistant coatingNumbered witness holes for quick round count referenceExtended polymer OD Green basepad for tactical reloadsBlacked-out finish ensures lifetime durabilityDesigned specifically for Springfield Echelon pistols this extended magazine provides increased capacity and enhanced functionality for tactical use competition shooting and extended range sessions.