Fits Beretta Optima Plus Choke Tube Systems - 12 Gauge TruGlo's best selling turkey choke Precision CNC-machined Accepts all turkey loads, including Hevi-Shot No steel shot Endorsed by the National Wild Turkey FederationpCombo Bonus: Free TruGlo Gobble-Dot Universal Turkey Sight. TruGlo's original turkey sight - new and improved Fits all ventilated rib shotguns regardless of width or tapering Extremely low-profile Front diameter is .060"; rear diameter is .035"