I built a backyard deck box and the last step was to install a strut to help lift the door & keep it from slamming shut. I ordered what I thought was the right one, but could not get it to work. I read about the excellent customer service, so I emailed and got a reply right away. Vigor & I exchanged many emails and he provided valuable advice and assistance. He showed me how to weigh the lid to find the size strut, and even sent replacement parts when we determined that I had originally ordered the wrong size. I could not have finished this project without this excellent customer service. If you need to install a lift assist strut, do not hesitate to order here, or to reach out to the customer service department first and they will help to ensure you get the right part. I highly recommend using this company, they are first class! Thank you Vigor!