Hammond 1591 Series Translucent Polycarbonate Enclosures – Hammond 1591STBU, Multipurpose translucent plastic enclosure, made from 2mm thickness polycarbonate material, part of Hammond 1591 T Series. Ideally suited for mounting printed circuit boards. Hammond 1591STBU Multipurpose FRABS Enclosure 110 x 82 x 44 Ice Blue