HDWTxx SeriesWATER-TIGHT CAST ALUMINIUM HATCH XX: CLEAR OPENING50: 500X50056: 500X60060: 600X60075: 750x750 OPTIONAL INSULATIONOPTIONAL STEEL FRAMEOptional Coaming: cm TYPE APPROVED HDWTxx HDWTxxTK HDWTxxTH HDWTxxTH180 HDWTxxTHLO HDWTxxG HDWTxxTHCM HDWTxxTHPR HDWTxxTHCCM Contact