Gerson 9000E Series paint spray respirator features easy to replace twist-on cartridges and snap-on prefilter retainers. The face masks are both durable and reusable and designed to be used over and over again. These Gerson respirators are low maintenance where only the cartridges or prefilters need to be replaced. Each 9000E Series kit contains 1 facepiece, 2 cartridges, 2 prefilters and 2 retainers. We also supply replacement cartridges G03E. (see our other products).