The 3M Speedglas 9100FX/ 9100 FX-Air extended coverage for the crown portion of the headgear is for use with 9100FX/ 9100 FX-Air welding helmet assemblies to help protect user from welding spark and spatter on the top portion of the head and neck.
The 3M Speedglas 9100FX standard headcover for the crown portion of the headgear is for use with the 9100FX complete helmet assembly to help protect the user from welding spark and spatter on the top...