PART NO. THREAD O-RING DIMENSIONS E F . G G A,B C S1 S2 S3 FF-04 9/16"X18 9/16"X18 9/16"X18 7.65X1.78 8.5 23 14 19 19 FF-06 11/16"X16 11/16"X16 11/16"X16 9.25X1.78 10 27.5 19 22 22 FF-08 13/16"X16 13/16"X16 13/16"X16 12.42X1.78 11 31 22 27 27 FF-10 1"X14 1"X14 1"X14 15.6X1.78 13.5 36.5 27 30 30 FF-12 1.3/16"X12 1.3/16"X12 1.3/16"X12 18.77X1.78 15 42 33 36 36 FF-16 1.7/16"X12 1.7/16"X12 1.7/16"X12 23.52X1.78 15 47.5 41 41 41