Horizon Sails makes replacing your bimini top canvas easy and offer replacement canvases for both 3 bow round tube Bimini tops and 4 bow square tube pontoon Bimini tops that are designed to fit all kind of boats. Choose from a wide selection of colors to match your boat. The canvas of a Bimini is almost the first part of the top to deteriorate. Horizon selection of Bimini replacement canvases for Bimini Top frames includes a variety of colors to choose from. Replacement canvases are available in featured fabrics which will protect you and your boat from damaging UV rays.