Our Pleated Dust Collection Cartridge is constructed similarly to pleated dust collection bags media and is made from 100% spun bonded polyester media. The sole distinction between the two is a change in filter area. These cartridges contain polyester media, which is composed of high tenacity filament yarn and is free of any binding agent. The resulting structurally strong hard finished material is resistant to hot gas assault. It also has strong pleat ability, great durability, and a unique structure of very fine filament yarn that offers high filtering performance.