1PC A5/B5 Hard Cover Loose-Leaf Notebook, Ins Style Semi-Transparent PP Plastic Hard Shell, Metal Rivet Loose-Leaf Binding, Detachable Loose-Leaf Ring Structure, Can Freely Add, Remove, Replace Inner Pages, Anti-Pressure And Wear-Resistant Smooth Surface, Lightweight And Minimalist Body, Blue And White Fresh Multi-Color System, Prevents Paper Creasing, Compatible With Loose-Leaf Refills, Assignment Paper, Error Correction Paper, Planner Decoration Paper; Detachable Ring Loose-Leaf Notebook