They are made of non-toxic durable plastic. Six translucent bright colors: green, yellow, red, orange, blue and purple in one size, each color two clips.They built-in elastic spring, bite more force and bite closer. Protect your food from air or water by keeping the bag fully closed and protect against freezer burn and stops food from becoming stale. It will keep the freshness of your food for much longer.These seal clips are suitable for all kinds of bags, plastic bag/craft bag/paper bag, which have bread, chips, candies, nuts，macaroni and so on inside. When it has been opened, the seal clips will keep food fresh.They can not only be used in your home kitchen, also in your office, garage, shed or wherever you require for a durable clips, keeps bags closed and air tight. Also, display a photo or a painting etc.