We've added a new line to our erasable, retractable water-based gel ink ballpoint pens. The "Frixion Ball Knock Zone" features three new functions: ① Tip Hold System: The pen tip is firmly gripped by a special three-pronged part, suppressing tip wobble and ensuring stable writing. ② Noise-Cut Knock: By adding a spring to the internal parts, the impact when knocking is softened, resulting in a moderate knocking feel while significantly reducing the knocking sound compared to conventional products (78% reduction). ③ Ver. 2 Refill: We've developed a new ink that writes darker and longer than conventional products. Compared to conventional products, the ink density has increased by 30% for black and 15% for red/blue. In addition, by adopting a metal pipe core, the ink capacity has increased by 70% compared to conventional products. Ball diameters are available in 0.5mm and 0.7mm. Ink colors are available in three colors: black, red, and blue. Neck: PC + Elastomer, Shaft: PC + Film Transfer, Shaft Ring: Brass + Tin Cobalt Plating, Clip: Iron + Tin Cobalt Plating, Clip Base: POM, Cap/Abrasive Cap: PC, Abrasive Material: Elastomer, Tip Holder/Rotating Cam/Knob: POM | Clip Slide Knock Type | The ink disappears when rubbed with the eraser. Do not use on documents or addresses that should not be erased. Do not place in direct sunlight or in high-temperature locations. The ink becomes colorless at temperatures above 60°C. Erased writing may reappear at around -10°C. Do not use for writing on anything other than paper. Depending on the type of paper or the characteristics of the printed material, it may not be suitable for erasing, such as thermal paper. If you rub with a dirty eraser, the paper will get dirty. Please wipe off any dirt before use.