The F-40500LK-6 Blue White Flow Meter is made from tough acrylic meter body, polished to a clear finish. Direct reading permanent scale. Features easy to read white back reflector. High grade 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. A quality Flow Meter at a phenomenal price. MTR2 .5-5 GPM ACY .37 FPT HAST