Characteristic: 1. Made of high quality plastic, durable and very comfortable. 2. This compact electric eraser allows you to quickly and precisely erase small areas of graphics. 3. The moderate size fits perfectly in the hand, is portable and comfortable to hold. 4. Equipped with 10 pcs. cartridges for eraser 2.3 mm and 10 pcs. 5 mm rubber band inserts, with which you can change the size of the core and adjust the length of the core. 5. Job-saving and effective, ideal stationery for art students, teachers and drawing enthusiasts. . ELECTRIC ERASER - 20 TENWIN CARTRIDGES . ELECTRIC ERASER - 20 TENWIN CARTRIDGES Specification: Brand : Tenwin Material: plastic Weight: 64 g/2.3 oz Length of electric eraser : 17.3 cm /6.8 inch Diameter of eraser inserts: 2.3 mm /0.01 inch, 5 mm /0.2 inch Battery model: AAA*2 batteries (none) Color : Gray, Black, White (Optional) . ELECTRIC ERASER - 20 TENWIN CARTRIDGES . ELECTRIC ERASER - 20 TENWIN CARTRIDGES List of packages: 1 x electric eraser (battery not included) 10 cartridges for eraser 2.3 mm 10 cartridges for rubber bands 5 mm Note: 1. Please allow 1-3cm error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated the same, the color of the item displayed in the photos may be slightly different from the actual object. Please take the real one as standard. 3. Please note that the new and old type of this product will be sent randomly and make sure you don 't mind before placing your order. . ELECTRIC ERASER - 20 TENWIN CARTRIDGES . ELECTRIC ERASER - 20 TENWIN CARTRIDGES . ELECTRIC ERASER - 20 TENWIN CARTRIDGES . ELECTRIC ERASER - 20 TENWIN CARTRIDGES