High-quality materials: waterproof PVC material, using solid round stainless steel ring buckle, high capacity, sturdy and durable, can be used for a long time; the transparent cover design is simple and beautiful, which is convenient for you to view the internal paper. Size details: A6 size, with a ring binder with an inner diameter of 2 cm, can hold 80-100 sheets of A6 filled paper, suitable for most standard A6 Replaceable inner pages of size [With lock & easy to carry: A6 size PVC binder cover is suitable for briefcases, backpacks, etc. It can protect your important files anytime and anywhere, record your life or inspiration. Sturdy buttons can effectively prevent the internal paper from falling The operation is simple: press both ends of the metal button to open the ring, then insert your own paper into the ring, press the open ring from both sides to the middle to close it, which is convenient for adding or deleting pages. MultifunctionalThis transparent PVC 6-ring binder set is suitable for diaries, travel diaries, business notebooks, offices, homes, schools, poetry, creative writing, sketching and painting, work records, study notes, mood diaries, practical gifts, etc. Kind of uses. Note: This product is only a cover, and the inner core is only used for taking pictures.