* Made of high quality Eco-friendly cardboard, strong and durable, not easy to break, can provide long service life. * Also can be used to organize your ribbons, fishing line, skein, jewelry making thread, washi tape, lace and more. * There are two thread clips slots on each card to keep the end of the thread stuck, also you can mark them for easy reference. * Perfect to use to keep thread organized and untangled, prevent them from getting twined, easy and convenient for classifying. * 200 pieces pack, good gift to your friends and relatives, those who are fond of sewing and organization.