In addition to world-class ammunition, hevi-shot offers the best chokes for your hunt, with gun specific styles available for most gun models.The chokes are manufactured from aircraft-quality 17-4 stainless steel and utilize state of the art patterning equipment, to achieved the optimum constriction by gun type, for the best possible pattern.Each hevi-choke has a knurled fore-end and can be hand tightened for easy field change-outs.Type: Choke TubeGauge: 12 GaugeConstriction Type: Extended RangeConfiguration: Invector DSFinish: BlackChokes Included: 1Material: 17-4 Stainless Steel