Primos Hunting TSS Invector Plus 12 GA. This extended choke tube allows for easy installation without the use of tools. Specifications for Primos Hunting TSS Choke Tubes: Manufacturer: Primos Hunting Color: Black Finish: Black Fabric/Material: Steel Choke Type: Turkey Quantity: 1 Features of Primos Hunting TSS Choke Tubes .670 Constriction (12 GA Mossberg 835/935) .650 Constriction (12 GA Remington 12 GA Invector/Mossberg 500 12 GA Invector Plus 12 GA Beretta/Benelli Mobil 12 GA Benelli Crio) .560 Constriction (20 GA Remington 20 GA Beretta/Benelli Mobil 20 GA Benelli M2) .390 Constriction (.410 Beretta/Benelli Mobil .410 Remington .410 Invector) Package Contents: Primos Hunting TSS Choke Tubes Primos Hunting 69416: TSS Invector Plus 12 GA