Cm. & special sizes available on request. Modern design improving image quality with light weight Aluminum frames and boards non metallic construction of four strong corner, easy locking soft push buttons; stainless steel plate springs keeps a permanent tension, Perfect grade foam on the back board for best film contras which can easily replaceable. The lead sheet on the back board to eliminate fog phenomenon of x-ray film. Cassettes are available in a variety of sizes to suit all kinds of requirements.