Update: I initially gave this product a low star rating because I learned the hard way that the U/O door seal T-ends are 5/16”, which was not listed in the description. Unfortunately, it took me 2 hrs to realize this after trying to fit it in my existing 1/4” channel. After dealing with the customer support, whit offered a refund, I increased the rating. Would get full 5 stars if the description included the measurement.