AA Faucet 4" Wall Mount No Lead Faucet with 3-1/2" Swivel Gooseneck Spout NSF AA-410G Excellent engineering design and qualified-skilled craftsmanship inside and outside Reinforced double O-Ring valves with hot and cold mark on stem Compression nuts & washers attached Color coded red and blue handles with heavy duty double O-ring 3-1/2" swivel gooseneck spout 1/2" NPT male inlets. NSF approved