Features: Perfect sewing bobbins kit, 15 mixed colors bobbins + 5 white bobbins + 5 black bobbins. Suitable for both hand stitching and machine sewing. Standard size fits most sewing machines, for Brother, Janome, Kenmore, Singer, etc. Polyester thread with good toughness, not easy to break. Other necessary tools are included: a measuring tape, a needle threader, 5 sewing needles and 8 buttons. With a plastic storage case for easy storage.