PTFE is a relatively stable material, which can filter water, organic solutions, strong acid and alkaline solutions (not suitable for trichloroethylene, gasoline, hexane, etc.). It can be used as experimental sample clarification filtration, liquid chromatography filtration, etc. This filter is a one-time use, about 10 ml of filtration at a time (specifically, there are great differences according to the impurities of the filtered liquid), and the filter membrane cannot be disassembled. 0.22μm can remove conventional impurities and visible to the eye. Generally used in conjunction with a syringe. Diameter: 25mm Pore size: 0.22μm (filter pore size) Interface: Standard syringe socket, which can be connected with conventional socket syringes. The outer diameter of the upper interface ( of the needle cylinder) is about 6.5mm, and the inner diameter is about 4.4mm. The outer diameter of the lower interface (pin end) is about 4mm and the inner diameter is about 2.2mm. Filtration area: 0.85cm2. Dead volume: Less than 30μL Filtration pressure: Less than 100psi Filtration temperature: Less than 60Celsius Colour:As shown Material: PTFE Package Contents: 100 x filter head Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.