Hammond 1551 series miniature abs boxes translucent blue hammond 1551mtbu 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 35 x 35 x 20 hammond 1551mtbu translucent blue abs enclosure 35 x 35 x 20mm