what pentel energel model is best used for long hours of writing

Pentel EnerGel RTX Retractable Liquid Gel Pen Burgundy 0.7 mm

Pen Review: Pentel EnerGel Clena Gel Pens - The Well-Appointed Desk

EnerGel® Deluxe Liquid Gel Pen – Pentel of America, Ltd.

High performance ink technology combines the best qualities of liquid and gel ink for a super-smooth writing experience Liquid gel ink dries so fast

Pentel EnerGel Retractable Liquid Gel Pen, 0.5mm, Blue Ink, Blue Body, 3 Pens & 3 Ink Refills

Pentel EnerGel RTX Deluxe Retractable Liquid Gel Pen, Fine .7mm Metal Tip, Black Ink, Pink/White Barrel (Bulk Lot of 15)

Best Micro Gel Pen: Choosing the Right One - The Well-Appointed Desk

Review: Pentel Energel Deluxe RTX, Gel Ink, 0.3mm – Pens and Junk

Gourmet Pens: Review: Pentel EnerGel-X Gel Ink Pens - 0.7mm

Pentel Energel Needle Tip, Office School Supplies, Pentel Energel Pens

Pentel EnerGel RTX Pens 1.0 mm Bold Point Black Ink Pack Of 3 - Office Depot