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AN hose size is measured inside the hose = (inner diameter of the hose). Depending on hose type, the outer diameter of the hose will vary. The type of hose technology has also changed since the Second World War when these connections came so the actual dimensions of the AN hose can vary. It also differs between manufacturers sometimes. So be sure to use the right hose for your AN hose ends and AN-system
PART NUMBER AN size DIA (inner) COLOR A506 AN 6 11/32 in. ~8.7 mm silver A508 AN 8 7/16 in. ~11.1 mm. silver A510 AN 10 9/16 in. ~14.2 mm. silver A512 AN 12 11/16 in. ~17.4 mm. silver A516 AN 16 7/8 in ~22.2 mm. silver A520 AN 20 1 1/8in. ~28.5 mm. silver All BLACKROCK LAB items that involve increases in power greater than those required by the highway code of the country of the user, are intended only for competitive use.
All BLACKROCK LAB disclaims all liability for any use of the product contrary to national standards.
PART NUMBER AN size DIA (inner) COLOR A506BK AN 6 11/32 in. ~8.7 mm black A508BK AN 8 7/16 in. ~11.1 mm. black A510BK AN 10 9/16 in. ~14.2 mm. black A812BL AN 12 11/16 in. ~17.4 mm. black A816BL AN 16 7/8 in ~22.2 mm. black A820BL AN 20 1 1/8in. ~28.5 mm. black
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