4pcs Bobbin Winder Rubber Tire Ring # 15287A for SINGER 15-91, 66-16, 99K, 128-3 SIZE:Dimensions 1 1/8 inch outer diameter, 9/16 inch inner diameter and is 1/4 inch thick. The alternative part number are：015287-717,102171002,120448001,120448051,15287-656,15287-701,1939,61662,647018004, 8132,F20213...