At first glance I thought These boxes are incredibly cheap but I love the space they provide provided for an outdoor wiring project I'm working on. When I used the first one I was immediately struck by the limitations of the boxes. I could be wrong but nothing comes of it really with 1/2" or 3/4" fittings - they can be metric. But then the connections won't be watertight. But then I noticed there was already a crack in one box. As I was trying to figure out when to do this project should move it felt silly i want to use the product which seems as strong as a zippered bag if you do something inside it can be useful but i'm still worried about the flimsy plastic and d he lack of structural integrity. Needless to say I threw it in the back in the box and sent it back to Amazon. By the way, I didn't notice that the boxes look light gray in the pictures, but they are actually more milky white.