Monteverde Ceramic Gel Ballpoint Refill (Parker Style) - Blue

Monteverde USA Refill To Fit Parker Rollerball Pens - Pack of 2 – Pens Galaxy BD

Monteverde Parker Style Fine Gel Ballpoint Pen Refills - Pen Savings

I have a sampler pack to share (more in comments) : r/pens

Monteverde Parker Style Ballpoint (F, M, B) G2 Refill - The Pen Refill Guide

Monteverde Extra Fine Ballpoint Refill Blue - Parker Style - Pen Boutique Ltd

Monteverde Capless Ceramic Gel P42 Ink Refill Compatible with most Parker Style Ballpoint Pens - Blue (Fine Tip 0.6mm)

MONTEVERDE C132 CROSS Green Soft Roll Medium Ballpoint Refill, Pk2 $11.95 - PicClick AU

Monteverde Parker Ceramic Fine Blue Gel Ballpoint Refills — Pulp Addiction

Review: Monteverde Soft Roll Refills - The Well-Appointed Desk