The  WVI00005 KASK visor carrier spigots into the WVI00003 Bayonet Adapter for ear muffs. 

This helmet accessory allows you to attach a removable WVI00006 KASK Mesh Visor

Designed to work with Plasma, Superplasma & HP series helmets

Used in conjunction with the following items: 

WVI00006 KASK Mesh Visor 

WVI00003 Bayonet Adapter for ear muffs.

Please note: KASK brand earmuffs are designed to carry the WVI00005 KASK visor carrier.