Product Details: Advantage®line of particulate, chemical, and combination cartridges are lightweight, low profile performance Cartridges fit both 200 LS Half Mask and 3000 Full-Facepiece Advantage®respirators Comfortable, lightweight protection Self-adjusting crown straps Consists of a polyethylene shell and suspension system working together as a protection system Also fits 420 Half-Mask Respirators and 1000, 3000 and 4000 Full-Mask Respirators. ________________________________________________________________________________________________________________