F-300 Series Flowmeter by Blue-White Industries Blue-White has re-engineered the classic F-300 series flowmeter to make it even more accurate, reduce space requirements for installation, and to provide enhanced features without changing the iconic look of this Industry favorite including the red cap! Features: Installs quickly Determine Circulation System flow rate in seconds One piece machined acrylic meter body polished to a clear finish Easy to read, high resolution dual scale, permanently printed Read flow from either side of the meter body Ships complete with gasket seal and mounting clamps