I need to buy some more of these soon. I love these for parts storage. I’ve gotten more since but I think I’ll definitely need more when I bring back more parts from South Dakota (my house back in Sturgis has a lot of my storage yet). These are actually 4×6 photo storage cases bought at Hobby Lobby for some where in the neighborhood of 30-40$. It took me forever to separate my 74 series logic, 4000 series and linear parts.