This is the Ocean Reef APA Aria Protective COVID-19 EMERGENCY ONLY Adapter for Full Face Mask - Adapter ONLY Features: EMERGENCY ONLY adaptations of full face masks to address COVID-19 EMERGENCY Available in the Middle of April Mask and Filter Sold seperately Please note: This is a Non-Returnable item APA - Aria Protection Adaptor Our original concept, it connects an OCEAN REEF made Full Face Snorkeling Mask, to any filter, or device with a 40mm 1/7" thread. OCEAN REEF manufactures full face masks for snorkeling and scuba purposes and through the brand Safety Protection Equipment, manufactures gas masks. The Patent is for an adapter to connect any full face snorkeling mask to filters with the aim of transforming the snorkeling mask, into a personal protection mask. OCEAN REEF has not completed testing & certification process yet. The news of this adaptor, sparked an overwhelming demand. What filters should I use with APA? 40mm threading canister Flters EN 148-1 we suggest to use with our product are: SAFETY PROTECTION EQUIPMENT P3 filter (SKU M40040-SP) Scott Safety Pro2000 P3 Filter Arco P3 40mm DIN Screw Thread Filter Mira safety Particle P3 and many more. In the beginning of March, we deposited an international Patent through our Italian company Mestel Safety, part of the OceanReefGroup, whom, under the brand OCEAN REEF manufactures full face masks for snorkeling and scuba purposes and through the brand Safety Protection Equipment, manufactures gas masks. The Patent is for an adapter to connect any full face snorkeling mask to filters with the aim of transforming the snorkeling mask, into a personal protection mask. OCEAN REEF has not completed testing & certification process yet. The news of this adaptor, sparked an overwhelming demand. Understanding the emergency is at its peak, OceanReefGroup has decided to open up possibilities for others to benefit from our Patent and designs and technical knowledge developed. Distinguishing between institutions/universities/hospitals and other non-for profit entities that can adapt our technology to their uses and possibly 3D print small quantities of adaptors and bigger entities whom might want to further develop, manufacture and scale our idea on a commercial basis, we are available to support and share with you our knowledge. Through links below, according to the different categories, you may get in contact with us. Institutions/universities/hospitals and other non-for profit entities will enjoy license for free, of one or more of our designs. "