At One Click Purchasing, we are your reliable source for the NSN part 4056489 manufactured by Draeger Medical Ltd. We carry a wide range of popular NSN items on our website, including O Ring like part number 4056489 which is listed with the NSN 5331016479942 for easy identification. If you are interested in 4056489 item, then take the advantage of our online RFQ service, or peruse our website as you see fit to find other items of interest that you may wish to learn more about.