Use your SA439 hoop to embroider unstructured caps and hats with this Durkee‡ Cap Frame Insert. The top plate holds the bill of your cap in place while the sticky stabilizer helps hold your embroidery area in place. Embroider a 4.5” x 4.5” design or logo effortlessly. Comes with Durkee’s‡ limited lifetime replacement warranty. Stabilizer SA5810 or adhesive stabilizer SA5906 is required and is sold separately.