The 4-inch cast brass spreader assembly is from T&S Brass. It is for use on single hole mounted pre-rinse faucets. It has 1/2" NPT male inlets and comes with a washer and 1/2" NPSM coupling nut. T&S Brass part number 002898-40.
EC Part Number: #02195
Mfg No.: 002898-40
Mfg: T&S Brass and Bronze Works