Pack of three replacement water-activated bobbins for use with Halkey-Roberts V85000, V86000 and V90000 Automatic life jacket inflators. Halkey-Roberts compatible water-activated bobbins replace Stearns, SOSpenders, Onyx and West Marine bobbins. Bobbins are good for three years from the manufacturer date. The bobbins do not constitute a complete rearming kit, but work as a substitute if the bobbin on your life jacket or in your kit is damaged. Be sure to check your life jacket and inflation system to match the products needed. Using the wrong components can be dangerous on the water.