Hammond 1551 Series Miniature Plastic Enclosures – Hammond 1551TTTBU, This Hammond 1551 series miniature plastic enclosure is ideal for mounting small PCBs or used as a potting box. The enclosure is moulded in general purpose ABS plastic, with a satin finish. The IP54 rated lap joint construction provides protection against access of dust and splashing water. Hammond 1551TTTBU Miniature Plastic Enclosure 60 x 60 x 15 Trans. Blue