Home Hardware & Fasteners Cockpit & Deck Hinges Aluminum Mill Finish Continuous “Piano” Hinge (1-1/2” x 6’) TACO Marine Aluminum Mill Finish Continuous “Piano” Hinge (1-1/2” x 6’) $15.69 Aluminum Mill Finish Continuous “Piano” Hinge (1-1/2” x 6’) quantity Add to cart Product Details Product Details 3/16″ holes drilled on 4″ centers. .040 gauge. Aluminum – Mill Finish. Open Width: 1-1/2″ x Length 6′.