Grip Limited) but all came with black ink so I had to replaced it with blue. Pilot G2 Retractable Premium Gel Ink Roller Ball Pens, Fine Point, Navy Blue Ink, Dozen Box (31187): Amazon.ca: Office Products I ordered various pens with G2 refills to try which suits me (Pilot G2 Limited, Pilot G2 Pro and Pilot Dr. I have used them for quite some time and all I can say is they are super-smooth and pleasure to write right out of box. Pilot G2 Retractable Premium Gel Ink Roller Ball Pens, Ultra Fine Point, Blue Ink, Dozen Box -31278: Amazon.ca: Office Products