The rod seal type Aston Seals XB is composed of:
XB 4 8.9 2.2 XB 5 9.9 2.2 XB 7 11.9 2.2 XB 8 15.3 3.2 XB 10 17.3 3.2 XB 12 19.3 3.2 XB 14 21.3 3.2 XB 15 22.3 3.2 XB 16 23.3 3.2 XB 17 24.3 3.2 XB 18 25.3 3.2 XB 20 30.7 4.2 XB 22 32.7 4.2 XB 24 34.7 4.2 XB 25 35.7 4.2 XB 26 36.7 4.2 XB 28 38.7 4.2 XB 30 40.7 4.2 XB 32 42.7 4.2 XB 35 45.7 4.2 XB 36 46.7 4.2 XB 37 47.7 4.2 XB 38 53.1 6.3 XB 40 55.1 6.3 XB 42 57.1 6.3 XB 45 60.1 6.3 XB 48 63.1 6.3 XB 50 65.1 6.3 XB 52 67.1 6.3 XB 55 70.1 6.3 XB 58 73.1 6.3 XB 60 75.1 6.3 XB 65 80.1 6.3 XB 70 85.1 6.3 XB 75 90.1 6.3 XB 80 95.1 6.3 XB 85 100.1 6.3 XB 90 105.1 6.3 XB 95 110.1 6.3 XB 100 115.1 6.3 XB 110 125.1 6.3 XB 120 135.1 6.3 XB 125 140.1 6.3 XB 130 145.1 6.3 XB 140 155.1 6.3 XB 150 165.1 6.3 XB 155 170.1 6.3 XB 160 175.1 6.3 XB 170 185.1 6.3 XB 175 190.1 6.3 XB 180 195.1 6.3 XB 185 200.1 6.3 XB 190 205.1 6.3 XB 195 210.1 6.3 XB 200 220.5 8.1 XB 210 230.5 8.1 XB 220 240.5 8.1 XB 225 245.5 8.1 XB 230 250.5 8.1 XB 240 260.5 8.1 XB 250 270.5 8.1 XB 260 284.0 8.1 XB 270 294.0 8.1 XB 280 304.0 8.1 XB 290 314.0 8.1 XB 300 324.0 8.1 XB 310 334.0 8.1 XB 320 344.0 8.1 XB 330 354.0 8.1 XB 340 364.0 8.1 XB 350 374.0 8.1 XB 360 384.0 8.1 XB 370 394.0 8.1 XB 380 404.0 8.1 XB 390 414.0 8.1 XB 400 424.0 8.1 XB 420 444.0 8.1 XB 440 464.0 8.1 XB 450 474.0 8.1 XB 460 484.0 8.1 XB 480 504.0 8.1 XB 500 524.0 8.1