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Home > Caterpillar Tunnel Product Info > What are the inner diameters of our bows?
What are the inner diameters of our bows?
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Non-swaged bow 17 gauge 1.2" or approximately 1 13/64".

Swaged bow 17 gauge .92" or approximately 59/64".

Non-swaged bow 14 gauge 1.15" or 1 1/8". 
Swaged 14 gauge .85 or approximately 27/32". 

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