the gas spring a hinged door (kitchen wall unit) were defective and that's why I ordered it in the kitchen company nach.Nach several weeks waiting time I signed up again at the company, where it was found that the wrong account number has been entered. So a 2nd time was ordered, which took a few weeks back. I built the gas spring from himself and sought by printed e-mail address to the company that manufactures these gas springs, they immediately found, ordered and within three days I had the necessary spare parts. Fast, easy and friendly service, I can only recommend.