Diaphragm for Anesthesia Mask 2-3/8 OD "
http://www.prestoimages.net/store30/rd14324/14324_pd3495052_33_.png
https://www.prestoimages.net/store30/rd1
Midmark Corporation
42978
http://www.americanpharmawholesale.com/store.php/AmericanPharmaWholesale/pd9360524