Features and Specifications:
This is not a Glock Factory Product, it is an after market Product
Manufacturer Number: PUBGL51
Material: 6061-T6 Aluminum
Finish: Anodized Matte Black
ISIM G17 +5 Capacity Extended Power Spring
Provides Quick Access to Magazine Internals via Removable Floor Plate
Does Not Require Full Disassembly
Reduces Wear on Magazine
Made in USA

Fits:
Factory Glock 17/34 Double Stack Magazines

Includes:
ISIM G17 Spring
#2-56 1/8 Socket Head Cap Screw
5/64 Allen Wrench