Name: Universal vacuum compression bag manual pump Size: Diameter of about 4CM stretched about 48CM Collapse 28CM Inflatable caliber 2CM Material: New ABS+Stainless Steel (Inset Threads, Compression Bags for Inserted Threads) Color: White/Blue/Pink and other random delivery Introduction: The so-called suction pump refers to a suction nozzle and an exhaust nozzle each having one inlet and outlet, and can continuously form a vacuum or negative pressure at the inlet; a positive pressure is formed at the outlet; the working medium is mainly gas An instrument. This suction pump is a manual pumping type and is suitable for most specifications of compression bags on the market.