The eyewash heads are chrome-plated brass and the flow from the eyewash complies with ANSI standard Z358

wall to push-button measures 3 1/2"

the back plate is reversible

The Bradley S19-220BF is a wall-mounted eyewash unit that exceeds the American National Standards Institute's Z358

Tough Guy White/Blue Plastic Compression Spray Bottle, 1L, 1 EA - 35WT58 Multi-Roll Toilet Paper Dispenser The eyewash heads are chrome-platedCompressed air spray bottles pressurize water, cleaning agents, and other liquids so they can be dispensed as a mist or stream.,Spray bottles and trigger sprayers are used to apply cleaners, degreasers, disinfectants, and other liquids. They are typically filled from bulk containers and used for small jobs, such as cleaning glass or countertops.