Janome Adjustable Zipper Foot - Cat A/BJanome Adjustable Zipper Foot (Category A B) is a neat, versatile foot thats ideal for accurate zipper insertion and a real must have when working with piping, whether youre using small, large or jumbo cords. The green adjusting screw at the rear lets you fine tune the position of the foot, so you can stitch neatly right up against the zip teeth or snugly alongside the piping cord for a beautifully clean finish every time. Category: B and C Part