1. Material: TPR
2. Safe material, no odor, rest assured of use
3. Clean erasing, less eraser crumbs into strips
4. Dual-head design, wipe more accurately, wipe-resistant and anti-loss
5. Thick rod + hole positioning, easy to hold, easier to wipe
6. Super toughness, soft and sturdy, no cracks when broken
7. Weight: small about 80 g / box, large about 140 g / box
8. Size: small size is about 9.7 cm long, large size is about 12.2 cm long