The F-41000GK-12 Blue White Flow Meter is made from durable machined acrylic meter body, polished to a clear finish. Direct reading permanent scale. White back reflector for easy reading. 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. durable, quality equipment for professional applications. MTR2 10-80 SCFM ACY.75FPT HAST