The pipet is completely protected after the installation of molded filter dry fragment in SPL capsid. To obtain the filtration of big capacity suction pipe, replaceable filter cores can be installed. Another feature of the suction pipe is that it uses filter dry fragment to clear up the compressor when it was buren. Features: 1. Durable steel shell prolongs the life of the equipments 2.Safe operating pressure: T-for pipet use 3.4Mpa SV-for aspirating tube use 2.7Mpa 3. Very little pressure loss when full flow 4. High corrosion resistance of surface 5. Various sizes of joints 6. Simplified internal parts make the installation convenient.