KW-trio 10pcs Plastic 30-Hole Loose Leaf Binders Ring Binding Spines Combs

Features:
30-Hole binding spines, 10pcs/bag.
12mm ring diameter, 9.5mm ring distance, can hold about 85 sheets paper.
Cylindrical ring design, easy to turn pages and protect paper.
The length of binding spines can be cut. Suitable for 6,9,20,26,30 hole notebook binding.
The binding spines can be used for A4, A5, A6, A7, B5 papers binding.