Check the listing for details. CPR Mask Replacement One-Way Valve - 10 Pack - Archer MedTech Brand. Condition: New. Listed at 9.86 USD. Home About Us Returns Shipping Contact Ten pack of replacement one way valves with filters for CPR masks. Fits all standard CPR masks with replaceable valves. Payment Shipping Returns We accept payment via PayPal. You can also pay with any major credit card on the PayPal site. We offer fast, free shipping for your order! You may return an unopened, unused, undamaged, resalable items within 14 days of purchase. You, the buyer, will be responsible for the cost of return shipping that includes a tracking number. STORE CATEGORIES TENS Snap Electrodes TENS Wired Electrodes TENS Accessories Other CONTACT US If you have any questions or concerns, please do not hesitate to Contact us PAYMENT We accept PayPal. You can pay by any major credit card on the PayPal site.