Black Scorpion Outdoor Gear Double Stack Competition Double Magnetic Magazine Pouch fits STI 2011 Magazines Black Standard. This magazine pouch enables the shooter to attach an additional magazine to the round magnet located on the side of the pouch. Both magnets can hold up to 30 lbs (13.60 kg). Specifications for Black Scorpion Outdoor Gear STI 2011 Double Stack Competition Double Magnetic Magazine Pouch: Manufacturer: Black Scorpion Outdoor Gear Fabric/Material: ABS Polymer Magazine Type: Double Stack Hand: Ambidextrous Gun Make: STI International Gun Model: STI International 2011 Belt Loop/Snap Width: 1.5 in Features of Black Scorpion Outdoor Gear STI 2011 Double Stack Competition Double Magnetic Magazine Pouch: Fits: 2011 Double stack magazines - Up to 170 mm; Cant: User adjustable 360 w/ 3 mm hex key; Retention: Magnetic; Warranty: Lifetime Package Contents: Black Scorpion Outdoor Gear STI 2011 Double Stack Competition Double Magnetic Magazine Pouch Black Scorpion Outdoor Gear MP04-USPSA-MGBK: Double Stack Competition Double Magnetic Magazine Pouch fits STI 2011 Magazines Black Standard