Our ingeniously crafted bobbins boast a unique blend of plastic and rubber, meticulously designed to securely cradle thread, effortlessly dampen vibrations, and serenade your sewing experience with a harmonious hush. Compatible with all machines, except the MB-4 and 1600 series.---FEATURES:---A) Versatile Compatibility: Seamlessly integrating with ALL household sewing and embroidery models, our product offers unparalleled versatility. Whether you own a vintage machine or a modern marvel, our innovation ensures a perfect fit, eliminating any compatibility concerns. B) Enhanced Performance: Elevating your sewing and embroidery experience to new heights, our product boasts a myriad of features designed to optimize performance. From lightning-fast stitching to flawless embroidery, our innovation empowers you to create masterpieces with ease. C) Intuitive Interface: Simplifying the intricate art of sewing and embroidery, our product showcases an intuitive interface that is both user-friendly and aesthetically pleasing. With a seamless navigation system and easily accessible controls, you'll effortlessly unleash your creativity. D) Cutting-Edge Technology: Pioneering the industry with cutting-edge technology, our product incorporates the latest advancements to revolutionize your sewing and embroidery endeavors. From advanced stitching algorithms to innovative embroidery techniques, our innovation sets the benchmark for excellence.