The F-42040LN-P Blue White Flow Meter is made from durable machined 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 Call For Details). Can be used in direct sunlight. Available OEM options: Private labeling, custom calibrations, custom materials. A great value - top quality at unbelievable prices. MTR2 8-40 GPM ACY 1.5 MPT PP