Features 100 SHEET CAPACITY: The loose leaf ring buckle can increase or decrease the inner pages at will to replace the inner core, or save the written inner core (can hold 100 paper cores) MANUAL OPERATION: Can be opened and closed manually, which is easy and convenient to use. Transparent color is easy to observe FOR FIX LOOSE LEAF: Fastening ring buckle to fix loose leaf paper core so that does not fall, useful and practical WIDE APPLICATION: Can be manually bound by punching suitable holes, which can be easily operated by any office, student party, and individual 10PCS IN TOTAL: The package contain a total of 10pcs binding spines, enough for you to replace and use, very convenient Specification: Item Type: Binding Spines Product Material: ABS Product Color: Transparent Package List: 10 x Binding Spines Package List 10 x Binding Spines