The Butler Creek Shotgun Plug ensures hunting compliance by limiting magazine capacity in 12 16 and 20-gauge shotguns with 2.75" and 3" shell compatibility.Butler Creek Shotgun Magazine PlugFits most 12- 16- and 20-gauge pump and auto shotgunsCompatible with 2.75" and 3" shell lengthsAdjustable - can be cut to desired lengthLimits ammunition capacity for hunting regulationsEssential for hunters in states requiring magazine capacity limits this versatile plug can be customized to meet specific legal requirements while maintaining reliable function in your shotgun.