b'Reference Diagrams1968-72 GM Midsize Convertibles: 7304 convertible top is notched at the bottom of the B-Pillars, and 7304A top is straight. Before placing your order, compare the existing top to the diagram and order the top that matches closest. Note that Robbins is not responsible for incorrect products being ordered.GL401/402 Non-Original GM GlassGlass is smaller than original1961-64 GM Fullsize & 1962-67 GMplastic windowMidsize Convertibles: Glass is smaller than original plastic window and has exposed colorTop does not cover edges of trim on all sides, as shown in the diagram.glass Curtain and Note that GL401 must be unzipped beforeedges of glass lowering top. Trimmer may have to make aare exposeddeeper well liner to fit glass.Reverse fold. Heat-sealed and top stitched edge1987-93 Camaro and FirebirdPART NO. DIMENSIONS (in inches) A B 1987-93 Camaro & Firebird Convertibles: 7203 42507204 4250Due to undocumented running changes 7205 4250A.S.C. and General Motors made to 7206 4550- 51 1987-93 Chevrolet Camaro and Pontiac Firebird convertible tops and top frames, B measurements are required in order to select a replacement top. Our measurement system is based on factory original tops. Carefully compare our top to properly fitting existing top before installing. Note that products are not 36 in. returnable once installation has started. A2014-16 Aston Martin DB9 VolanteTwo convertible top variations have been identified, believed to be due toa running change by the OEM. The two tops are distinguishable by the rear window position. Measure from the bottom edge of the glass (not the DLO) to bottom edge of binding at center. If measurement is 3" order part #2560AC. If measurement is 6 order part #2560BC.69'