I am very pleased with this product. I ordered the 1/4" and an glad I did. The door is very sturdy and there's no gaps, perfect fit. Only thing I could complain about is the hinges are squeaky. Simple fix with little vegetable oil. The locks were slightly loose, so i decided to tighten the screws, a little too much.....be careful if you do this, i cracked the door stopper and the cover itself. You can see the bottom lock where i glued it back together and it works just fine. Outside of my own stupidity, I'm very happy with this conversion kit and highly recommend it to anyone looking to repurpose their 40 gallon breeder tanks.