Hollis M-3 Mask Color:Black The pressure gauge has a

The pressure gauge has a shock resistant bourdon tube mechanism and is equipped with a double Kevlar braided high-pressure hose with triple chrome plated marine brass fittings with 7/8" threaded end

training logistics and cost estimates

Optional Corrective Lenses

Fail-Safe Valve Design

Flexibility & Rigidity for Efficient Propulsion

Hollis M-3 Mask Color:Black The pressure gauge has aThis products Overview Visibility is the most important aspect of any dive. The M3 Mask raises the bar for optical quality and distortion free vision and superior fit. The extra crystal clear Saint Gobain Diamant tempered glass single lens is valued for its attractive appearance and optical qualities. The low iron content produces a higher light transmittance and a reduced green tint inherent in other glass. This makes the lens distortion free and