Hammond 1551 series miniature abs boxes translucent blue hammond 1551rtbu a range of miniature translucent blue enclosures that are constructed from moulded abs and are available in various sizes their lap joint construction and self tapping screw lid means these enclosures are ideal for use as potting boxes and mounting small printed circuit boards dimensions 50 x 50 x 20 hammond 1551rtbu translucent blue abs enclosure 50 x 50 x 20mm