The case is made from aluminum and the center is hard anodized black. Dimension are 11.5 x 7.5 x 4.5. With harmonicas, case weighs under 10 pounds. All the corners are riveted on all three sides. The corner protectors are chromed steel. The inside has a 1/8 inch layer of High Density foam. There are 4 rubber feet on the hinge side. The polycarbonate dividers are move-able, easy to cut and interchangeable. This allows the harmonica player to configure the case to meet his/her specifications. If you purchase extra dividers, you can customize the case to have more than one configuration. You will have no problem fitting 12-16 hole chromatics, diatonics, Bullet Mikes and even little amps! CLICK HERE TO PLACE YOUR ORDER!