Zurn AquaSpec Z831R1 Polished chrome-plated widespread with adjustable centers from 6" [152mm] to 20" [508mm], a 5" [127mm] centerline cast brass low rofile spout and quarter turn ceramic disc cartridges. Unit is furnished with a 2.2 GPM [8.3 L] pressure compensating aerator (complying with ANSI 112.18.1 Standard for flow), 2-1/2" [64mm] vandal-resistant color-coded metal lever handles, mounting hardware and 1/2" NPSM coupling nuts for standard lavatory risers. Widespread accommodates installations up to 1-1/2" [38mm] thick.