Hamilton Bell Biocon Cases and Vari-cases are made from a virtually unbreakable resin material. Extremely durable, all cases have “permahinge” construction and a positive locking device, easy to open, yet remains tightly shut when not in use. The No. 7560 Vari-case will hold more than 12 instruments. In addition, the Vari-case has an extra compart-ment to hold such items as slides, cover glass, lens paper, magnifiers, etc.