XS Scuba Brawn Regulator - Second Stage OnlyThe Brawn regulator combines performance, reliability and economy in one package. Designed to take the high use demands of a rental department without the need for constant adjusting. Factory cleaned and ready for pre blended Nitrox up to 40% oxygen. Second Stage: Pneumatically balanced downstream design Adjustable dive predive venturi lever Flexible, easy purge cover for quick clearing Chambered exhaust tee directs bubbles away from your face