3M TuffMaster H4 Economy Pinlock Headgear, Blue, For Use With: Any 3M Faceshield, Material: Thermoplastic, Standards: ANSI Z871
- High-strength thermoplastic crown
- Provides impact resistance over a wide range of temperatures
- No snaps, bands, or cams easy window replacement
- Five position crown strap
- Environmental/occupational health & safety
- Pinlock closing adjusts from size 6-1/2 to 8" in 1/8" increments