1) Fin specification for A type: L60*W27, L77*W27, holes distance 25mm 2) Fin specification for B type: Width 50mm or 60mm, holes array as 11*19.05 (22 equilateral triangle shape) 3) Fin specification for D type: O.D9.52 copper tube, holes distance 25mm*25mm (square shape), fin pitch:4.2mm |