... sewing.. 2.Material: polyester, fiberglass, aramid, P84, acrylic, PPS, PTFE and PTFE membrane surfac filter bags 1.Filter bag is exquisite sewing ... .. 2.Material: polyester, fiberglass, aramid, P84, acrylic, PPS, PTFE and PTFE membrane surface 1.The material of the filter bag: (1 ... shapes to the users requirement including round, trapezoidal, flat and profiled filter bag. 3.We can provide two different ...