Axcel AVX-41 Ranger Fiber Optic Ring Pin 1601639 Green/Green. 010 or 0.019 dia fibers. These rings include two pins as part of the ring that allow the shooter to change colors and pin diameters as needed. Each type of ring has specified pin colors and scope diameter. This kit includes the rheostat ring for brightness adjustment. Specifications for Axcel AVX-41 Ranger Fiber Optic Ring Pin 1601639: Manufacturer: Axcel Color: Green Hand: Ambidextrous Features of Axcel AVX-41 Ranger Fiber Optic Ring Pin: 0.010" dual pins Green Green pin colors Designed to fit the AVX-41 scope Rheostat ring Package Contents: Axcel AVX-41 Ranger Fiber Optic Ring Pin Axcel AVX4-RRPRH10-GRGR: AVX-41 Ranger Fiber Optic Ring Pin 1601639 Green/Green