Specification: 

• Diameter : 20mm
• Color: Blue
• Material: Plastic
• Net weight: 2gram
• Ukuran Produk : 7.7x2.8x2cm
• Ukuran Lubang : 2x1.6cm
• Packing: Plastic Bag

Features:

• Can be used as bookmark & pageholder
• Light weight, easy to use and carry
• Ideal for reading with one hand, while standing, sitting or lying down
• Makes reading more comfortable
• Avoids breaking the spine of the book
• Help the teacher with not enough hands
• Unique book holder fits on the thumb like a ring and spreads the pages of the book open