Single Mag Case Size:9/40 The TR 3712N filter is

The TR 3712N filter is compatible with both filter covers TR 370 and TR 371

Internal 1/4 inch spacer mesh for airflow

-Twist-lock captive-eye carabiners with 5

3D flap covered cell phone / radio chest pocket

Single Mag Case Size:9/40 The TR 3712N filter isZero9 Single Mag Case Tackle your next mission with the rugged Zero9 Single Mag Case! Easily attach to your vest via a single molle lok or belt via the tek lok for quick access and secure fit. Contoured form factor allows for a good grip and the hole pattern allows for mounting at multiple angles. Prefer your single mag at a 45 degree angle? You can mount the Zero9 Single Mag Case at various angles on vests and belts. Carry your mag in either