Dwyer Rate-Master® Model RMA. 2 in. scale. Used to indicate or manually control air or gas flow from 0.1-1800 cu. ft./hr., or water flows up to 8 gal./min. Body, bezel, and flow tube are an integral piece, which has been injection molded of polycarbonate around a precision tapered pin. Stainless steel mounting bracket. Will withstand pressures up to 100 psi. and temperatures up to 130°F. Accuracy is ¬±4% of full scale. Tapped for 1/8 in. pipe connections. Dual range in English & metric available on some models. Range, to be selected from list below, must be provided at time of order. Price is dependent on fittings and range seleted. Enquire about price when ordering.