D1 type Refill
(ISO12757 standard)

[ Specification ]
Item: R-4C7NP
Name: OHTO R-4C7NP 0.7
Writing ball: Tungsten Carbide
Ink: Soft
Color: Black
Size: Full length: 67.5mm, Diameter: 2.3mm
Weight: 1g
Material: Stainless
Spare refill: Multi-function pen(MF-25B3, MF-20K3A, MF-20K3B)