The F-40500LK-8 Blue White Flow Meter is made from tough 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 Call For Details). Standard models #316 stainless steel, PVDF, Teflon float. (Optional K-series hastelloy C-276 Call For Details, PVDF, Teflon). Can be used in direct sunlight. Available OEM options: Private labeling, custom calibrations, custom materials. Guaranteed to get the job done and then some. MTR2 .5-5 GPM ACY .50 FPT HAST