The F-40500LN-6 Blue White Flow Meter is made from durable 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 Call For Details). Standard models #316 stainless steel, PVDF, Teflon float. (Optional K-series hastelloy C-276 Call For Details, PVDF, Teflon). Acceptable in direct sunlight applications. Available OEM options: Private labeling, custom calibrations, custom materials. See the quality Blue White has to offer. MTR2 .5-5 GPM ACY .37 FPT