Trulock Precision Hunter Beretta-Mobil 20 Gauge Choke Tube Improved Modified Ported. This choke tube by Trulock is much needed when you want to create a design in your muzzle. The Tru Lock Shotgun Choke Tube was specially designed and manufactured by professionals who know exactly what you need and want out of your tools. When you're doing changes on your piece you want to make sure you have exactly what you need; you want to make sure you have Tru-Lock Precision Hunter Choke Tube. Specifications for Trulock Precision Hunter Beretta-Mobil 20 Gauge Choke Tube: Manufacturer: Trulock Finish: Black Fabric/Material: 17-4 Stainless Steel Gauge: 20 Choke Tube System: Beretta/Benelli Mobil Gun Make: Beretta Quantity: 1 Package Contents: Trulock Precision Hunter Beretta-Mobil 20 Gauge Choke Tube Trulock PHBER20601P: Beretta Precision Hunter 20 Ga Improved Modified Ported