The stationary series of the web-manga Boys Jump+ series (monster #8) is a addictive and smooth writing (Jet STREAM multi-functional pen 4 & 1) 0.02 inch (0.5 mm) diameter ballpoint pen (black/red/blue/green) 4 colors and a 0.5 mm lead diameter mechanical pen in 1 piece... Clear and dark drawing. Features a spring tip that prevents direct draw line with excellent quick-dry ink. They are replaceable so you can use them for a Available in a variety of different types. Size: Diameter approx. 0.5 x 5.8 inches (13.7 x 148.8 mm). Made in Japan.