INCLUDES 4 GAS MASK FILTERS. PERFECT FOR STOCKING UP! VERSATILE: Flexible, full-range protection. A practical multi-gas filter with P3 particle filter, the helps protect the user from known respiratory threats, such as toxic industrial chemicals (TICs) and biological particulates. This user-friendly 40mm filter cartridge is easy to deploy so you can quickly identify the protection our respirator filters offer at a glance without wasting precious minutes. CONVENIENT: Compact size and 10+-year shelf life. Easy to stockpile and suitable for long-term storage, the filters are safe to use until the expiration date that is marked on the filter housing. The sealed plastic canister can seamlessly fit into any emergency preparedness or survival kit and features durable, rugged construction for reliable operation and protection when you or your family need it the most. ECONOMICAL: Superior protection you can afford. Cost-effective and built to last, the KYNG NBC Filter is an entry-level 40mm gas mask filter that offers the safety and broad range protection you expect from a premium respirator filter with a price point that’s tough to beat. These economical combined filters for gasmasks are ideal for stocking up for yourself, your family, or your organization. UNIVERSAL: NBC NATO standard size. Engineered with a 40mm x 1/7 threading, the multi-gas filter is compatible with your existing full-face CBRN respirator mask. These premium threaded filters for gas masks are built to comply with a wide variety of stringent international standards.