Product name: Kaco G2 gel ink refills<br> Writing point: 0.5mm<br> Ink Color: Blue<br> Refill standard: ISO12757 international universal refill<br> Material of tube: PP<br> Tip: 2.30mm bullet tip<br> Tip material: stainless steel<br> Length : 99mm<br> Diameter: 5.7mm<br> Package: 10pcs/pack<br>