raw edge, slip, collar, or flange: connector ends do not match fitting orientation & field verification duct ends dont match raw edge flange mismatch wrong connector slip drive collar adapter missing stop and identify what connector each end was supposed to receive. two correct duct sizes do not make a usable joint when the end treatments are incompatible. these pieces are the correct size and marks, but one end is flanged and the adjoining end is raw. i checked the spool and do not see an adapter-was a connector piece missed?