Product Description Videos Keep your bobbin thread from unwinding with this clever Tulip shaped bobbin clamp. Made of rubber and works with type A-Class 15 and L bobbins. 12 pieces per package. Color: Assorted Made of: Rubber Use: Bobbin Clamps to stop unravelling Included: 12 Clamps The Gypsy Quilter Tulip Clamps Keep your bobbin thread from unwinding with this clever Tulip ...