This new high-performance regulator is ultra-lightweight and flexible, using an efficient demand system that allows for easy breathing. 2nd stage face is made of stainless steel with a mirror-polished finish. 1st stage R600 boasts extremely high-performance while being compact and lightweight. With ultra-high performance balanced diaphragm. New white regulator incorporates a white flexible Miflex hose (for less strain on the jaw and mouth) Deflector mechanism to reduce intake resistance. Improved operability by enlarging the purge button. Demand System Click Spring Adjustment Advanced Flow System allows ease of air flow and makes air delivery smoother due to the curved housing structure. The Ortho-Conscious Mouth Piece feature prevents jaw fatigue. The ridges and flexible material allow the diver to have more control of the mouth piece and reduces tension in the jaw. Read more Colors Available: Black (BKBK), White (WW)