Williams™ Western Precision Muzzleloading Sight Set - Fiber Optic Insert - 0.019" Bead - Green - 650208The Williams Western Precision Muzzleloading Sight insert will work in all of the Williams Western Precision Globe Sights. This particular model features a highly visible green fiber optic cord that has been made even smaller in diameter than the original insert to allow for better target acquisition at longer ranges. Along with better target acquisition, the fiber optic is much easier to see than standard inserts and is highly beneficial in low light