MUJI Gel Ink BallpointPen Smoothly Knock Type YellowGreen Water Based 0.5mm 5Set
Specifications / Mixing ratio Body: Polycarbonate Top / Tip: ABS resin Spring / Screw: Copper Refill Body: PP Refill Tip: Copper. I made a ballpoint pen knock type body with an original design. Ink type Water-based.