Please note that these hatches are built in England and made to metric system standard dimensions. All Imperial equivalents are approximate.

The hatch is silver anodized aluminum with 1/2" thick gray tinted plexiglass. Please click on the forward hatch link below under "May we also suggest" for more information to help identify if yours is the Lewmar Ocean hatch. Lewmar Size 40 Medium Profile

Known Usage Medium Profile hatch would appropriate:
• Catalina 350 (all years)

There may be other instances where the 19-5/16" x 19-5/16" hatches were used. It is also possible that not every boat described above used this hatch. Please use the dimensions above and the photos below to verify which hatch is actually installed on your boat.

• Outside of deck flange: 492mm x 492mm (~19-3/8" X 19-3/8")
• Cutout in the deck: 421mm x 421mm (~16-9/16" X 16-9/16")
• Lens thickness: 12mm (~1/2")
• Height off the deck: 32mm (~1-1/4")