The F-42025LK 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). Acceptable in direct sunlight applications. Available OEM options: Private labeling, custom calibrations, custom materials. Quality material and construction that's made to last. MTR2 5-25 GPM ACY 1.5 MPT HAST