Change the tubing easily and rapidly; automatic tubing retention; accept 9 sizes tubing to meet different flow rates request. Two kinds of material housing for customers’ selection. PSF (polysulphone material): white, exquisite appearance, good rigidity, high precision, usually used in research laboratory and supporting analytical device. PPS (polyphenylene sulfide material): black, resist organic solvent corrosion, high precision and rigidity, suitable for industry or other bad working conditions. Rollers assembly with 304 stainless steel material resists corrosion with long lifetime.