The F-42040LN-PVDF is made from tough acrylic meter body, polished to a clear finish. Direct reading permanent scale. White back reflector for easy reading. High grade Viton o-ring seals. (Optional K-series hastelloy C-276). Acceptable in direct sunlight applications. Available OEM options: Private labeling, custom calibrations, custom materials. A quality Flow Meter at a phenomenal price. MTR2 8-40 GPM ACY 1.5 MPT PVDF