... -filter: 316 SS polished casing, filtering core from SHANGHAI FILTER CO., LTD., material: hydrophobic PTFE film, filtering accuracy: 0. ... filter): 316 SS polished casing, filtering core from SHANGHAI FILTER CO., LTD., material: hydrophobic PTFE film, filtering accuracy: 0.01 ... Series air Flowmeter from Changzhou Shuanghuan Thermo-technical Instrument Co., Ltd.; manual control range of flow: 400~4000L/h ...