These chokes are for the beretta/benelli mobil shotguns.Steel, lead, & hevi-shot may be used in this constriction, however, no steel shot larger than #bb or speeds exceeding 1550 fps should be used in choke tube tighter than full.Made in the usa.Gauge: 12 GaugeConstriction Type: Improved CylinderConfiguration: Benelli/BerettaFinish: StainlessConstrictiondiameter: .715Chokes Included: 1Material: Stainless Steel