XISAOK Rolling Ball Refill, Blue/Black Ink Medium Point Smooth to Write Quick Drying

Features:
For using with Rollerball Pens. Selectip gel rolling balls, and document marker.
Roller pen refill, medium tip, blue or black ink option.
Quality ink offer consistently smooth writing on paper
Beautifully pigmented black and blue ink captures your thoughts
Medium tip for everyday writing, journaling, drawing.

Specifications:
Ink Color: Black; Blue
Pen Refill Specification: 0.5mm
Size: Approx. 11.2cm/4.41in
Weight: Approx. 9g
Material: Plastic

Note:
1.Transition: 1cm=10mm=0.39inch
2.Please allow 0-3cm error due to manual measurement. make sure you do not mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you

Package includes:
1 Piece Pen Refill