This is a fantastic product. I first ordered three and then recently another two for two more windows. They are impressively good quality for the price, I looked far and wide and do not think there is anything on the market that rivals these in quality/ value. Easy to assemble, assuring that your windows are not like mine, all 1/8" to 1-5/8" in variations due to turn of the century building construction. Even then, still manageable. Excellent product.