To properly install an invisible zipper, you must have an Invisible Zipper Foot. As the zipper coils are guided through the tunnel system, the needle sews as close to the coils as possible. This easy-to-use foot ensures your zippers are finished professionally and rival that of any high quality garment.Babylock: BL20A Anna, BL30A Molly Bernette: B37, B38Elna: 2600 Blue, 2800 Blue, 3210, 3230, 5200, 5300, 6003, 6003Q, 6005, 7200 Pro Quilters Dream, 8007, 8020, 8600, 9500, 9600, ec30, ec60, En Vision CE20, eXcellence 580+, eXcellence 720, eXcell