So I will be ordering another one of these trays for a Makita medium case and therby getting even more organized. It showed how to look up the CUSA code to see where the disc originated. The inner foot bed is made with a nice spongy memory foam over a more rigid foam and includes an additional heel pad inside the construction of the inner sole. But they now don’t work and it was time for a new set. my daughter get little upset with it . Garbage quality. I manage to get them to sound rich enough with that as otherwise, Id just return them. We took two trips to Indiana from Texas. The threads were all bent and lapped over so I couldnt even put it together. Now I have another two sets of less then great sounding Inkd headphones that will be stuffed in a drawer for ages.