Model EV-1500 and 3000 pumps are compact, low cost pumps that provide variable speed/flow rates and feature a "fast prime" switch for quick priming. Pumps have flow rates to 3850 ml/min and accommodate tube sizes from 3.2 to 10.0 mm. They are available in two and three roller models and feature polycarbonate/ABS pump head designed to accept Autoprene, Silicone or Viton tubing.