What is the practical difference between the K-60 and K-63

and contains 10 ml of paint and can easily be refilled again and again

non-greasy application

Colors in this set: 105 Titanium White

pentel energel lrn5 needle point refill 0 5 mm 3 pack Dart What is the practical differencePack of 3 Pentel EnerGel gel ink refills in the same color. Available in black, red, and blue. The refill cartridge has a 0. 5mm ball diameter with 0. 25mm line width. LRN5 refills work with all refillable Pentel EnerGel pens, including the Pentel EnerGel BLN75 Needle Point Rollerball Pen 0. 5mm. EnerGel ink flows smooth and dries fast for clean writing without smudging.