Browning Grand Passage Invector Plus 12 Gauge Imp. Cylinder Choke Tube.- Specifically designed for waterfowl.- Unique geometry for non-toxic shot.- Minimum gap geometry reduces build up of plastic in shotgun bore.- Extended length for quick and easy removal.- Stainless steel with black oxide finish and Mossy Oak Duck Blink camo band.- True, bore-matched constrictions.- Timber and Teal tube has helical design to spin shot – making it excellent for tight timber, teal and close range shooting.Browning Grand Passage Invector Plus