This hoop is compatible with Husqvarna Viking Designer Diamond Deluxe Royale Ruby Topaz 50 30 40 25 20 Epic 2 Brilliance 80 Pfaff Creative Sensation Pro II Vision 5.5 5.0 4.5 4.0 Performance etc. Other compatible machines, please check your machine manual. Sew Tech embroidery machine hoops are precise and durable. Clear markings on hoops for easy reference. The adjustable metal screw on the hoop helps you firmly tighten a wide range of fabrics. Perfect for replacing old hoops or having extra hoops to speed up your embroidery projects.