The F-41000LNB-12 Blue White Flow Meter is made from tough machined acrylic meter body, polished to a clear finish. Direct reading permanent scale. Features easy to read white back reflector. Viton o-ring seals. (Optional K-series hastelloy C-276). Standard models #316 stainless steel, PVDF, Teflon float. (Optional K-series hastelloy C-276, PVDF, Teflon). Acceptable in direct sunlight applications. Available OEM options: Private labeling, custom calibrations, custom materials. Unparalleled quality and construction. MTR2.2-20GPM ACY .75FPT BRS