Ordered set of qtr window louvers. Installed as directed. The 3m tape backing is crap and they fell off after only a week. Ordered a second set and made sure application was followed to the letter and same result. Out 260.00 and got no resolution or response from customer service after 2 weeks. Highly recommend NOT buying from this company! They have made no attempt to even discuss the issues with their product. They also have a 88# in the box to call with issues with the product. The contact from that # claims they do not service the product. Ridiculous!