ProMag Pistol Magazine Glock 17/19/26 9mm Luger 25 Round Black 1 Pack DuPont Zytel Polymer 25RD. It is constructed of DuPont Zytel polymer with full length steel internal insert injection molded mag follower and mag spring formed from chrome silicone wire. Specifications for ProMag Glock 17/19/26 9mm Luger 25 Round Pistol Magazine: Manufacturer: ProMag Gun Make: Glock Gun Model: Glock 17 Glock 26 Glock 19 Caliber: 9mm Luger Magazine Capacity: 25 Round Color: Black Fabric/Material: Polymer Package Contents: ProMag Glock 17/19/26 9mm Luger 25 Round Pistol Magazine What firearm models does the manufacturer say ProMag Glock 17/19/26 9mm Luger 25 Round Pistol Magazine is compatible with? The manufacturer suggests that ProMag Glock 17/19/26 9mm Luger 25 Round Pistol Magazine is compatible with Glock 19 Glock 26 Glock 17ProMag GLKA15-25RD: Pistol Magazine Glock 17/19/26 9mm Luger 25 Round Black 1 Pack DuPont Zytel Polymer