Pentel EnerGel Deluxe RTX Gel Ink Pens, 0.7-mm, Assorted Colors (6-Pack) for $5.00. Shipping is free on orders over $35. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for your reference. The pens are retractable and refillable with Pentel LR7 ink refill.