The Handi Feet Couching Kit includes three sizes of interchangeable couching feet: 1.5mm (blue), 2mm (pink), and 3mm (yellow). With three sizes to choose from, you will always have just the right size foot for adding couched embellishments using a variety of specialty threads, fibers, and yarns to your quilt. Compatible with all HQ machines with Interchangeable Foot Mount. NOTE: All optional Handi Quilter feet for HQ longarms require your Handi Quilter machine have the Interchangeable Foot Mount. HQ machines manufactured before November 2014 may need the Handi Feet Conversion Kit installed to make optional feet compatible with your machine.