The F-40660LN-8 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). Can be used in direct sunlight. Available OEM options: Private labeling, custom calibrations, custom materials. A great value - top quality at unbelievable prices. MTR2 6-60 GPH ACY .50 FPT