Upgrade your sewing with these high-quality clear plastic bobbins, designed for professional and home sewing machines. These transparent Class 66 bobbins make it easy to monitor thread levels while ensuring smooth, reliable stitching. Perfect for various Universal models and other compatible top drop-in bobbin machines. Each pack includes 4 durable bobbins, measuring 25/32" x 3/8", ideal for both everyday sewing and professional projects. Features Made of high-quality plastic for long-lasting use Transparent design for easy thread monitoring Class 66 – compatible with select Singer and drop-in bobbin machines Singer part for reliable performance Fits multiple Singer sewing machine models Compatible Machine Models SINGER: 66, 99, 101, 185, 192, 201, 247, 288, 327, 328, 329, 401, 403, 404, 413, 416, 418, 457, 476, 477, 478, 500, 717, 719, 814, 834, series 6100, 6500, 7100 Specifications Brand: Universal Units: 4 per pack Material: Plastic Size / Dimension: 25/32" x 3/8"
