You'll need one of these kits to attach bayonet style hearing protection to your KASK HP Plus helmet.
To add the Australian Standard Ear Muffs to your KASK HP Plus you'll also need these. They attach directly to the holes on the side of the helmet (currently marked with little grommets). The ear muffs then attach to these brackets.
KASK Helmets are NOT supplied with these Adapters.
Model Number: 140217