You can find all the details of fin geometries in the below table

GEOMETRY FIN SPACING
21,00 mm x 12,70 mm 7,00 mm 1,2....4,2 mm
19,05 mm x 16,50 mm 7,00 mm 1,2....4,2 mm
25,00 mm x 21,65 mm 7,00 mm 1,6....6,0 mm
25,00 mm x 12,50 mm 3/8" (9,52 mm) 1,4....4,2 mm
25,40 mm x 15,875 mm 3/8" (9,52 mm) 1,5....4,5 mm
25,00 mm x 19,00 mm 3/8" (9,52 mm) 1,2....4,2 mm
25,00 mm x 21,65 mm 3/8" (9,52 mm) 1,5....6,0 mm
25,40 mm x 22,00 mm 3/8" (9,52 mm) 1,5....4,5 mm
25,00 mm x 25,00 mm 3/8" (9,52 mm) 1,6....4,2 mm
25,40 mm x 25,40 mm 3/8" (9,52 mm) 1,6....4,0 mm
30,00 mm x 26,00 mm 3/8" (9,52 mm) 1,5....5,9 mm
31,75 mm x 27,50 mm 3/8" (9,52 mm) 1,8....10,0 mm
35,00 mm x 35,00 mm 3/8" (9,52 mm) 1,8...8,0 mm
31,75 mm x 27,50 mm 1/2" (12,70 mm) 1,8....9,0 mm
40,00 mm x 34,64 mm 1/2" (12,70 mm) 1,8....12,0 mm
35,00 mm x 35,00 mm 1/2" (12,70 mm) 1,6....12,0 mm
60,00 mm x 30,00 mm 5/8" (15,87 mm) 2,1....8,0 mm
40,00 mm x 34,64 mm 5/8" (15,87 mm) 1,8....12,0 mm
50,00 mm x 50,00 mm 5/8" (15,87 mm) 2,0....10,0 mm