MTM Shotshell Box 25 Round Flip-Top 10 12 Gauge Up To 3.5in. Green. The latch of the MTM Shotgun Shell Case has been designed to be opened easily even with gloves. The 10 gauge shells fit tight and will loosen up after a few uses. The MTM Shotshell Organizer can also be used to organize some brands of 12 gauge choke tubes with a maximum length of 3.1". Specifications for MTM Shotshell Box 25 Round: Manufacturer: MTM Number of Rounds: 25 Color: Green Gun Type: Rifle Caliber: 10 Gauge Length: 3.1 in Features of MTM Dual Gauge Shotshell Case: 10 or 12 Ga. Up to 3 1/2" loaded Package Contents: MTM Shotshell Box 25 Round MTM S25-12M-11: Shotshell Box 25 Round Flip-Top 10 12 Gauge Up To 3.5" Green