This hoop is compatible with Husqvarna Viking Designer I Rose 600 Iris Scandinavia 400 300 etc., Sewing and Embroidery Machine. Other compatible machines, please check your machine manual Sew Tech embroidery machine hoops are accurate and strong Clear markings on hoops for easy reference Adjustable metal screw on the hoop help you to clamp a wide range of fabric firmly Used as a perfect replacement of the old hoops or have extra hoops to speed up your embroidery projects This Sew Tech Standard Embroidery Hoop B (4x4 inch / 100x100 mm) is specifically designed for Husqvarna Viking Designer I, Rose 600, Iris, and Scandinavia 400/300 sewing and embroidery machines. (Please check your manual for additional compatible models.) Featuring clear reference markings and an adjustable metal screw, it securely holds a variety of fabrics for precise, professional-quality stitching. Whether you need a dependable embroidery hoop replacement or an extra hoop to streamline your workflow, Sew Tech delivers accuracy and strength for every project in your machine embroidery supplies.