| outer diameter hole diameter segment dimension segment number |
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| 4"(105mm) 20/22.23mm 1.7*7*35mm 8 |
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| 4.5(115mm) 20/22.23mm 1.9*7*38.3mm 9 |
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| 5"(125mm) 20/22.23mm 2*7*32mm 10 |
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| 6"(150mm) 20/22.23mm 2.2*7*33mm 11 |
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| 7"(180mm) 20/22.23mm 2.2*7*35mm 13 |
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| 9"(230mm) 20/22.23mm 2.5*7*40mm 16 |
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| 10"(250mm) 22.23/25.4mm 2.5*7*40mm 17/18 |
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| 12"(300mm) 22.23/25.4/50mm 2.8*7*40mm 20/21 |
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| 14"(350mm) 25.4/50mm 2.8*7*40mm 24 |
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| 16"(400mm) 25.4/50mm 3.2*7*40mm 28 |
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| 18"(450mm) 25.4/50mm 3.2*7*40mm 32 |
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| 20"(500mm) 25.4/50mm 3.2*7*40mm 36 |
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| 22"(550mm) 25.4/50mm 3.2*7*40mm 38 |
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| 24"(600mm) 25.4/50mm 3.2*7*40mm 42 |
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