Made with Titanium and Nickel, the Clam Nitinol Spring bobbers are highly sensitive, kink-free, and extremely durable. This same material is used in the dental industry and is strong and durable, yet very pliable. Hi-Vis orange wrap and glow bead for easy bite detection. Grab your favorite panfish rod, add Clam's Nitinol spring bobber, and you won't miss those finicky biting fish! Are you building a custom rod? Tie Clam's Nitinol Spring Bobber on as the finishing touch!FeaturesTwo packOverall Length 3 A 1/2 inchesIncludes PVC rubber clamp to secure to rod blankAdjustable lengthDurable and highly sensitiveHi-Vis orange wrap with glow bead