Sanitary Face Masks by Nasco Healthcare $233.95 LF03123 CPR Valves. Use with Sanitary Face Mask. Pkg. of 25. / LF03123 / Cart TITLE CPR Valves. Use with Sanitary Face Mask. Pkg. of 25. Product ID LF03123 CheckoutType Cart Add to cart CPR Valves. Use with Sanitary Face Mask. Pkg. of 25.