QEI Dimensional Data
Airflow 
Length
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Height | Slip Fit | Height |
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Length
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| QEI Class I | QEI Class II | ||||||||
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Size |
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inches (mm) | inches (mm) | inches (mm) |
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9 | NA | NA | NA | 17.13 | (435) | NA | NA | 28.5 (724) | 36.5 | (927) | ||||||
12 | 17.5 | (445) | 26.5 (673) | 37.5 (953) | 17.13 | (435) | 28.5 | (724) | 36.5 | (927) | 30.5 | (775) | 36.5 |
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15 | 21.13 | (537) | 29.0 (737) | 41.5 (1054) | 20.88 | (530) | 31.0 | (787) | 41.0 | (1041) | 34.0 | (864) | 41.0 | (1041) | ||
16 | 23.31 | (592) | 31.0 (787) | 44.0 (1118) | 23.00 | (584) | 33.0 | (838) | 44.0 | (1118) | 34.0 | (864) | 44.0 | (1118) | ||
18 | 25.63 | (651) | 33.0 (838) | 46.5 (1181) | 25.38 | (645) | 35.0 | (889) | 46.5 | (1181) | 39.5 | (1003) | 47.5 | (1207) | ||
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20 | 28.06 | (713) | 35.5 (902) | 50.5 (1283) | 27.81 | (706) | 37.5 | (953) | 50.5 | (1283) | 41.5 | (1054) | 50.5 | (1283) | ||
22 | 31.13 | (791) | 39.0 (991) | 53.5 (1359) | 30.88 | (784) | 41.0 | (1041) | 53.5 | (1359) | 44.0 | (1118) | 53.5 | (1359) | ||
24 | 34.25 | (870) | 42.5 (1080) | 55.5 (1410) | 34.00 | (864) | 44.5 | (1130) | 57.5 | (1461) | 49.0 | (1245) | 59.5 | (1511) | ||
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27 | 37.69 | (957) | 45.0 (1143) | 61.0 (1549) | 37.44 | (951) | 47.0 | (1194) | 61.0 | (1549) | 53.0 | (1346) | 63.0 | (1600) | ||
30 | 42.00 | (1067) | 52.0 (1321) | 64.5 (1638) | 41.62 |
| (1057) | 54.0 | (1372) | 65.0 | (1651) | 60.5 | (1537) | 72.0 | (1829) | |
33 | 46.13 | (1172) | 56.5 (1435) | 68.0 (1727) | 45.75 |
| (1162) | 58.5 | (1486) | 69.0 | (1753) | 65.0 | (1651) | 76.5 | (1943) | |
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36 | 51.06 | (1297) | 62.0 (1575) | 75.0 (1905) | 50.56 |
| (1284) | 64.0 | (1626) | 75.0 | (1905) | 69.0 | (1753) | 82.5 | (2096) | |
40 | NA | NA | NA | 55.75 | (1416) | 68.5 | (1740) | 83.0 | (2108) | 75.5 | (1918) | 90.5 | (2299) | |||
44 | NA | NA | NA | 61.62 | (1565) | 74.0 | (1880) | 89.5 | (2273) | 80.5 | (2045) | 97.0 | (2464) | |||
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49 | NA | NA | NA | 67.75 | (1721) | 80.5 | (2045) | 96.5 | (2451) | 86.5 | (2197) | 104.0 | (2642) | |||
54 | NA | NA | NA | 75.00 | (1905) | 87.0 | (2210) | 105.0 (2667) | 93.5 | (2375) | 111.0 | (2819) | ||||
60 | NA | NA | NA | 82.88 | (2105) | 91.5 | (2324) | 113.0 (2870) | 102.5 (2604) | 119.0 | (3023) | |||||
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18