Bomar 900 Series molded marine hatches are a great addition to your boat and make great replacements for older, leaky hatches Quick action dogs - handle latches Vent positioning Smoke acrylic lens Collet arm Color: White Hatch Opening: 19 1/4" x 19 1/4" Hole Cut Out: 19 3/4" x 19 3/4" Outer Diameter of Deck Flange: 21 7/8" x 21 7/8" Outer Diameter of Lid: 22-1/16" x 22-5/16" Includes: Trim Ring & Screen