1. Easy to replace the inner core, one key to open and close, easy to take out 2. Matte texture, waterproof and scratch-resistant 3. Four kinds of inner pages are optional, thickened paper, double-sided writing 4. Elastic buckle, large capacity design, can hold more 5. Material: double tape, PP shell 6. Applicable refills: general 4mm hole spacing refills 7. Size: A5 case is about 18x22cm, A5 refill is about 14x21cm, B5 case is about 21.2x27.8cm, B5 refill is about 18.5x26cm
