... ----as an inherent property,open and stiff Polyester substrate TEDA pleatable filter media is divided into two types based ... airborne particles and a layer of open and stiff Polyester substrate as a support for pleating. They features ... , energy-saving, environment-friendlyl Usage: mini-pleat air filter, V-filter, HEPA filter, cabin filter, air cleaner, vacuum cleaner filter,etc. air filter material