Crafted from pvc, these 12mm diameter binding coils is great for securely binding multiple page Enhancing your document presentation organization, easy to cut binding spines, making it essential supplies Widely used for refillable notebook, binder journal, planner, photo album, scrapbooking, organizing meeting paper, study notes, making document management and efficient seamlessly binding with our 30 hole Binding Spines 30 Rings Binding Comb, great for letter size sheet, ensuring your document is both organized and easily accessible Suitable for students, teacher, worker, business professional, and craft enthusiasts, this 30 rings binding comb caters to various of binding needs