The Mustang PFD Bobbin Replacement is a replacement part for the automatic inflation style life vests. Bobbins are a replacement part for all Halkey Roberts type automatic
inflators. They dissolve when immersed in water and cause the CO2
cylinder to inflate the PFD. All Mustangs automatic inflatable PFDs come
with cylinders and bobbins.
We recommend annual maintenance and inspection of your PFD. For
recreational use, bobbins should be replaced every three years to avoid