This Standard Cassette Transfer Box holds 12 cassettes in the exposed section and 12 cassettes in the unexposed section. The Standard features a center handle interlock system that prevents simultaneous opening of doors at the x-ray room and darkroom sides, and 1.5mm lead protection. For maximum space economy it projects only 10” into the darkroom and is almost flush on the x-ray room side. Available in soft gray or stainless steel, it comes with a non-reflective black corrugated rubber interior to cushion the cassettes.