3M 7282 Easi-Air Inhalation Valve 7800S Series Facepiece Respirator – Bag of 50. 3M 7282 Easi-Air Inhalation Valve 7800S Series Facepiece Gas Mask Respirator – Bag of 50. Bag of 50 New in bag valves. 1 Bag holds 5 “cards” (clear packs) of 10 valves for 50 total. Diameter: 1.34 Inch (34 mm) – Approximately. Designed for 3M Full Facepiece Respirator 7800S Series. Ag of 50 New in bag valves. &#######xA0; Please be sure to include a street address (not a PO Box) for any method other that US Postal Service. &#####x200B;&#####x200B;&#####x200B;&#####x200B;&#####x200B;&#####x200B;&#####x200B. &#######xA0;&#####x200B;&#####x200B;&#####x200B;&#####x200B;&#####x200B;&#####x200B;&#####x200B. Our customers are our highest priority. Media, Books, and Software are non-refundable.