I need 41 inches of 3 inch (i.d.) CEET ducting. I assume I need to order 4 'units' of tubing which would give me 48 continuous inches. Is this correct?
That is correct. It is sold per foot, in whole units. So you need quantity 4 for 48 continuous inches, then cut off 7 inches once you get it.
The description table gives only one internal dimension for a duct with an oval cross-section. Is the given ID the longest dimension of the oval or the shortest dimension?
For example, for CEET ducting with an oval cross-section of 3.2 by 1.7 should I order 05-30513 or 05-30507?
CEET material is round not oval. Order using the I.D. of the unit.
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