TFENG Teflon felt liquid filter bags are made of teflon felt (also known as PTFE felt). PTFE has the characteristics of acid and alkali resistance, resistance to various organic solvents and high temperature resistance. So the TFENG Teflon filter bags inherit the above advantages. TFENG Teflon filter bag can be used for a long time at -180 ~ 260 °C, and strong acid & alkali.