This item is a set of empty sewing machine bobbins in storage box, which are made of durable ABS material. Bobbins can stop more quickly, effectively preventing unraveling or tangling of bobbin thread when sewing operations stop and start. Features -Color:Transparent -Material:ABS -Size:2.14X2.14X1.14cm/0.84X0.84X0.45in -Those bobbins are suitable for domestic sewing machine, very practical. -Perfect for anyone just starting out with an embroidery machine or a sewing machine. -Transparent color is generous, and it is more convenient to see the color of the thread wound on the bobbin. -The old iron bobbin is easy to rust and lead to broken line stuck line, transparent bobbin and large to solve this problem. -Bobbins can stop more quickly, effectively preventing unraveling or tangling of bobbin thread when sewing operations stop and start. Package list: 400 x Bobbins