Pro Mag Glock Magazine Spacer for 17/22 Magazines In 26/27 Pistols. The spacer takes up the space between the bottom of the frame and the floor plate of the longer magazines. The spacer is held in place by a single allen screw. The spacer is textured to match the For Glock pistol frame. Constructed from injection molded polymer. Specifications for Pro Mag Glock Magazine Spacer for 17/22 Magazines In 26/27 Pistols: Manufacturer: ProMag Color: Black Fabric/Material: Injection Molded Polymer Gun Model: Glock 22 Glock 17 Glock 27 Glock 26 Gun Make: Glock Package Contents: Pro Mag Glock Magazine Spacer for 17/22 Magazines In 26/27 Pistols What firearm models does the manufacturer say Pro Mag Glock Magazine Spacer for 17/22 Magazines In 26/27 Pistols is compatible with? The manufacturer says that Pro Mag Glock Magazine Spacer for 17/22 Magazines In 26/27 Pistols is compatible with Glock 26 Glock 27 Glock 17 Glock 22Pro Mag PM089A: Glock Magazine Spacer for 17/22 Magazines In 26/27 Pistols