The piston seal type Aston Seals YB is composed of:
YB 8 3.1 2.2 YB 10 5.1 2.2 YB 12 7.1 2.2 YB 15 7.5 3.2 YB 16 8.5 3.2 YB 18 10.5 3.2 YB 20 12.5 3.2 YB 22 14.5 3.2 YB 24 16.5 3.2 YB 25 17.5 3.2 YB 28 20.5 3.2 YB 30 22.5 3.2 YB 32 24.5 3.2 YB 35 27.5 3.2 YB 36 28.5 3.2 YB 38 30.5 3.2 YB 39 31.5 3.2 YB 40 29 4.2 YB 42 31 4.2 YB 45 34 4.2 YB 48 37 4.2 YB 50 39 4.2 YB 52 41 4.2 YB 55 44 4.2 YB 57 46 4.2 YB 60 49 4.2 YB 62 51 4.2 YB 63 52 4.2 YB 64 53 4.2 YB 65 54 4.2 YB 70 59 4.2 YB 75 64 4.2 YB 80 64.5 6.3 YB 85 69.5 6.3 YB 89 73.5 6.3 YB 90 74.5 6.3 YB 95 79.5 6.3 YB 100 84.5 6.3 YB 105 89.5 6.3 YB 110 94.5 6.3 YB 115 99.5 6.3 YB 120 104.5 6.3 YB 125 109.5 6.3 YB 130 114.5 6.3 YB 132 116.5 6.3 YB 133 112 8.1 YB 135 114 8.1 YB 140 119 8.1 YB 145 124 8.1 YB 150 129 8.1 YB 154 133 8.1 YB 155 134 8.1 YB 160 139 8.1 YB 165 144 8.1 YB 170 149 8.1 YB 175 154 8.1 YB 180 159 8.1 YB 185 164 8.1 YB 190 169 8.1 YB 200 179 8.1 YB 210 189 8.1 YB 220 199 8.1 YB 230 209 8.1 YB 240 219 8.1 YB 250 229 8.1 YB 260 239 8.1 YB 270 249 8.1 YB 280 259 8.1 YB 290 269 8.1 YB 300 279 8.1 YB 310 289 8.1 YB 320 299 8.1 YB 330 305.5 8.1 YB 340 315.5 8.1 YB 350 325.5 8.1 YB 360 335.5 8.1 YB 370 345.5 8.1 YB 380 355.5 8.1 YB 390 365.5 8.1 YB 400 375.5 8.1 YB 410 385.5 8.1 YB 420 395.5 8.1 YB 430 405.5 8.1 YB 440 415.5 8.1 YB 450 425.5 8.1 YB 460 435.5 8.1 YB 470 445.5 8.1 YB 480 455.5 8.1 YB 490 465.5 8.1 YB 500 475.5 8.1