Heidolph Peristaltic Pump Hei-Flow Value 06 - 036150030 "This peristaltic pump is ideal for the simple conveying of all media. • Adjust the variable speed from 10-600 rpm on the analog control knob. Your speed is held constant even under changing loads • Control accuracy of ± 5% • Pump operates clockwise or counterclockwise at a push of a button • This model is designed for only single-channel pump head • Flow rate of 4 – 4,151 mL/min with single-channel pump head • High speed range from 50 – 600rpm" Dimensions (L x W x H"): 20 x 20 x 20