This unit comes in 6 variations including: G1778LH-L, G1778LH, G1778LH-R, G1778L, G1778 & G1778R (Please see the "Technical Data Sheet" for specifications). The Guardian G1778LH features the AutoFlow eye/facewash for easy mounting on the wall. The dual FS-Plus spray heads swing down from storage to operational position, activating the water flow. Each spray head includes a flip-top dust cover, internal flow control, and filter to remove impurities from the water flow. This model also includes a 1/2" plug-type valve with Teflon coated O-ring seals, an in-line strainer to protect from debris in the water line, and an ANSI-compliant identification sign.