Onyx Replacement Bobbin

The Onyx Replacement Bobbin is an essential service part for anglers and boaters who depend on Halkey-Roberts inflatable life jackets equipped with bobbin-activation technology. This yellow water-sensitive bobbin serves as the critical trigger mechanism in your PFD's inflation system, designed to deploy your life jacket automatically when submerged. If you've had your jacket in storage or regularly use it on the water, keeping a replacement bobbin on hand ensures your safety equipment remains fully functional when you need it most.

This bobbin operates by dissolving when exposed to saltwater or freshwater, triggering the inflation mechanism without requiring manual activation—a hands-free safety feature that performs even when you're incapacitated or unaware. The bright yellow color makes it easy to identify and inspect visually, and the compact 2 x 1 x 4 inch design integrates seamlessly into any compatible Halkey-Roberts jacket without adding bulk. At just 0.05 lbs, it contributes negligibly to overall weight while delivering reliable, time-tested performance that has protected thousands of mariners over decades of real-world use.

Serious boaters, commercial fishermen, and recreational anglers who log extended hours on open water should replace their bobbin annually or whenever visible wear or discoloration appears. Replacement is straightforward and requires no tools or special training—most anglers complete the swap in minutes, making this an affordable insurance policy for your safety system. Compatible exclusively with bobbin-activated Halkey-Roberts inflatable life jackets, this genuine Onyx Outdoor replacement part maintains the original performance standards your jacket was engineered to deliver.