Hammond 1591xx series multipurpose translucent blue enclosures hammond 1591xxctbu the hammond abs enclosure multipurpose translucent blue 121 x 66 x 40mm is a multipurpose plastic enclosure ideally suited for mounting printed circuit boards horizontally the internal sides of each enclosure are smooth for easy connector installation a strong tongue and groove lid is supplied with each box construction and this provides protection against access of dust and splashing water they have a