Bomar N108010A, BOMN108010A FEATURES: Anodized heavey-duty aluminum frames. Heavy-duty acrylic top. No sharp corners tp snag lines or sails. Spare parts available. CE approval available. Please specify when ordering. Heavy-duty hinges. quick acting, adjustable tie down dogs. Locked on vetn position. Height above deck approx. 1”. Molded trin ring, sewn screen available on select sizes. 1060-10A (Style A-External Hinge) OPTIONS: Inside/outside opening. Powder coating. White acrylic. Hatch Opening: 17 3/8” x 17 3/8” Hole Cut out: 18 1/2” x 18 1/2” O.D. of Deck Flange: 20 1/8” x 20 1/8” O.D. of Lid: 20 7/8” x 20 7/8” *We recommend P2000-81 tape for mounting.