AO Tuffmaster Headgear, H8A, Blue, 9 x 6 in

Features: Five position crown strap for additional support and comfort | High strength thermoplastic crown | No snaps, bands, or cams | Pinlock closing adjusts from size 6 1/2 in to 8 in in 1/8 in increments. | Provides impact resistance over a wide range of temperatures | Easy window replacement