The Hollis 210/O2 Second Stage Tech Regulator is certified for up to 100% Oxygen Service thanks to Highly Specialized Component Materials and Manufacturing Processes. Cleaned and Assembled in a Clean Room Environment with Specially Designed Materials, Halocarbon Based Lubricants and Color-Coded for Easy Identification. The Second Stage Housing is manufactured from Durable ABS/Polycarbonate. 

Second Stage has a Patented Orthodontic Silicone Rubber Mouthpiece for exceptional comfort and Reduced Jaw Fatigue. The Mouthpiece accommodates the natural Overbite of the human jaw making this one comfortable breathing regulator. The Hollis 210/O2 Second Stage Regulator is a Standard Downstream Demand Valve Design and has an integrated Soft Cover Purge Button. The Second Stage is a Compact Lightweight Design with a 2.9" (7.4 cm) Front Profile and weighs 6 oz (170 g). Regulator comes with a CD Owner's Manual and is covered by a 24 month limited warranty.