The Suspa C16-21696 Gas props on the upper cabinet doors of my U270 had lost their ability to hold the doors open. I contacted Suspa to see if they could be recharged, they advised they could not. I shopped around for pricing, including at Amazon, and Ebay, and found the best price by far was direct from Foretravel. They sold 40 of them to me for 8.87 each, including shipping
Be sure to install them with the rod end down. It keeps the seal lubricated and they hold nitrogen much longer that way.