SCUBAPRO’s flagship second stage, with its metal casing, screw-down casing cover and metal valve housing, exhibits a real muscularity in design. Its air-balanced valve technology and oversized exhaust valve, plus responsive user controls, create a bullet-proof breather with effortless inhalation and an ease of exhalation that is unmatched. Learn more at:
http://www.scubapro.com/en-US/USA/regulators/products/mk25-evoa700.aspx