The F-42050LN-P Blue White Flow Meter is made from durable 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 Call For Details). Acceptable in direct sunlight applications. Available OEM options: Private labeling, custom calibrations, custom materials. A great value - top quality at unbelievable prices. MTR2 10-50 GPM ACY 1.5 MPT PP