Axcel AVX-31 Bow Sight Ring Pin 31mm Triple Threat FO Ring Pin .019 Black. Its interchangeable ring-pin design allows fiber color or diameter changes to match varying conditions. A single post houses three individual fibers offering multiple reference points without increasing pin count. The included rheostat cover enables controlled pin brightness for consistent visibility. This pin is designed specifically for use with compatible AVX scope housings. Specifications for Axcel AVX-31 Bow Sight Ring Pin: Manufacturer: Axcel Color: Black Attachment Type: Ring Diameter: 31 mm Archery Sight Style: Triple Stack 0.019 Diameter Pins Features of Axcel AVX-41 Triple Threat FO Ring Pin: Interchangeable ring-pin design Single post with three individual fiber references Allows fiber color or diameter changes Includes rheostat cover for brightness control Compatible with AVX 31 and AVX 41 scopes Not compatible with AV or AX scopes Package Contents: Axcel AVX-31 Bow Sight Ring Pin Axcel AVX3-TRP19-GRG: AVX-31 Bow Sight Ring Pin 31mm Triple Threat FO Ring Pin .019 Black