Black Invisible Zippers YKK Concealed Zips 12 Inch Zippers Set of 12 Pieces by Craftbot

Zips open and shut smoothly but did NOT fit into my invisible zipper foot on my sewing machine. Kind of disappointed as my intent was to uplevel my sewing skills with a professionally set zipper. Anyone else have this problem??

Product arrived quickly, in excellent condition and, thus far, have withstood wear and tear.

Good quality zippers. very white.