Seal Size ( d ) d3 d6 d7 L1 L3 f 14 25 21 27 35.0 10.0 6 16 27 23 27 35.0 10.0 6 18 33 29 33 37.5 11.5 7 20 35 29 35 37.5 11.5 7 22 37 31 37 37.5 11.5 7 24 39 33 39 40.0 11.5 8 25 40 34 40 40.0 11.5 8 28 43 37 43 42.5 11.5 8