Advantages: 1. different specifications and colors 2. fit slide binder or spiral 3. striped or plain 4. quick delivery Our PVC binding cover was made by high quality PVC materials.it can fit cover book, slide binder or spiral.The surface can be plain or stripedWe have specifications from A4 0.15 , A4 0.18, A4 0.20, A4 0.25, A4 0.28. A3 0.15, A3 0.18, A3 0.20, A3 0.25, A3 0.28