It's easy to refill as 1, 2, 3 with STABILO BOSS ORIGINAL refill. Find out more of other STABILO products from links below; Physical stores;... | By STABILO | Facebook
Stabilo Highlighter Refills Are Available at National Book Store
Pack of 4 x Bright Yellow Stabilo Boss Highlighters Rechargeable Refills Pen | eBay
STABILO Boss Original Highlighter Refill - All Colours - Box of 20 4006381312103 | eBay