Trulock Browning Invector Plus Super Waterfowl 12 Gauge .690. This choke tube by Trulock is essential when you want to etch a design in your muzzle. The Tru-Lock Super Waterfowl Choke was professionally designed and manufactured by professionals who know exactly what you need and want out of your tools. When you're doing changes on your gun you want to make sure you have high-quality; you want to make sure you have True Lock Waterfowl Choke Tube. Specifications for Trulock Super Waterfowl Choke Tube: Manufacturer: Trulock Gauge: 12 Choke Type: Full 3 Package Contents: Trulock Super Waterfowl Choke Tube Trulock SWBIP12690: Browning Invector Plus Super Waterfowl 12 Gauge .690