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This eyewash manifold assembly for the Guardian Equipment G1540 Eye Wash consists of a yellow pull-down plastic manifold and a 3-foot (91 cm) drain hose. Given the price on this item it may be more economical to simply purchase an entire new G1540 instead, but that's obviously your call.
Replacement spray heads are available as item # G1540SH.
Cross-reference: this item is equivalent to the WaterSaver Faucet Company's EW540CVR.