The Maxpedition Dual Mag Pouch Retention Insert has a panel size of 6 inches hight x 4 inches wide with hook backing. The Dual Mag Retention Insert attaches onto the loop field present in the CCW compartment of a variety of Maxpedition packs. Two retention loops of 2 inches wide elastic each hold up to two single stack .45 mags or a double stacked mag. The loops works just as well with multitools, flashlights, batons, pepper spray, etc.