PILOT Friction Ball 3 Erasable Gel Ink Pen-0.5mm, black / red / blue ink (body color: black) + &3 Colors Gel Ink Pens Refills [VALUE SET / 2 Items] The most popular of friction ball 3 in erasable friction series, deals also comes with three colors of ink refill set !! It has won the Good Design Award [Size] friction ball 3/Bodywidth 13.8  height 145mm, Ball diameter 0.5mm