I found Proline on line and liked the products that they offer. The item I purchased arrived right on time and it was easy to install. The online as well as the enclosed installation instructions were very generic and wasn't very helpful. The item that I received had two baffles and the mounting screws were missing. I called the support line and they promised to send the missing items via USPS, the snail mail. I received the email confirmation that the parts had been sent. Two weeks passed and I received no items as promised. I called back, my fourth call, to the support and got the same response that the items will be mailed shortly. As of today no email confirmation has been received. It appears that after the sales there are no support services. NADA, ZERO. I will NOT purchase any of their products in the future. NO Customer Service exists in proline.