
Fall Protection & Respiratory
4-Gas Calibration Gas - 50% LEL Methane / 18% O2 / 25 ppm H2S / 100 ppm CO, 34-116 L
- Calgaz · MSA · Industrial Scientific
- CH4 2.5% (50% LEL) / O2 18% / H2S 25 ppm / CO 100 ppm / N2 balance

Soft silicone reusable half mask with a cool-flow exhalation valve and low-profile bayonet mounts for P100 pancake filters or combo cartridges. Built for welders, abatement crews and anyone wearing a respirator all shift.
Tell us quantity, sizes and delivery city. Volume pricing and custom branding are confirmed on a written quote.
Soft silicone reusable half mask with a cool-flow exhalation valve and low-profile bayonet mounts for P100 pancake filters or combo cartridges. Built for welders, abatement crews and anyone wearing a respirator all shift. • NIOSH-approved when used with the same manufacturer's filters/cartridges • Silicone faceseal for all-day comfort and long service life • Cool-flow exhalation valve reduces heat and moisture build-up • Low-profile P100 pancake filters keep sightlines clear under welding helmets and face shields • Adjustable drop-down head harness for easy donning • Sizes S, M, L - fit test required (OSHA 1910.134) Brands we quote: 3M · North · MSA. Brand names are trademarks of their owners. Mays is an independent supplier, not an authorized agent of any brand; current manufacturer models are confirmed on your written quote.

Fall Protection & Respiratory

Fall Protection & Respiratory

Fall Protection & Respiratory

Fall Protection & Respiratory