uni-ball UB-157 Eye Rollerball Pens. Premium Fine 0.7mm Ballpoint Tip for Super Smooth Handwriting, Drawing, Art, Crafts and Colouring. Fade and Water Resistant Liquid Uni Super Ink. Box of 12 Black :
Uni-Ball EYE UB-157 Fine Liquid Ink Rollerball Pen - Tropical Set - Pack of 5 : Amazon.co.uk: Stationery & Office Supplies
UNI-BALL UNIBALL EYE FINE UB-157 GEL PEN 0.7mm UB157 Many Colours Available | eBay