Schmidt's 6040 is a fiber-tipped fineliner that is shaped like a standard European rollerball refill. It will turn a rollerball into a broad writer that is much more akin to a marker than a ballpoint or standard rollerball. These are used when you want your rollerball body to write like a PaperMate Flair or Sharpie
Schmidt® 6040 Fineliner Rollerball Refills
Green Box Elder Classic Rollerball Pen - Lanierpens
Schmidt Ink Schmidt 6040 Fineliner W/ Spring Loaded Refill Fits Most Capped
SCHMIDT® 6040 Fineliner Medium Fiber Tip Refill – The Office Shoppe
Machine Era Markup with Schmidt Fineliner Refill
Schmidt P900 Softline Ballpoint Refill - Various Colours
What brand / model pen is this? : r/pens
Studio Pens - SCHMIDT FINELINER REFILLS - FL 6040 - BLUE - MEDIUM
Metal Tube with fiber tip spring absorber. Reservoir based refill with metal tube and stainless steel front section. Fits most international sized
Schmidt 6040 FineLiner Fiber Tip Metal Rollerball Refill in Black - Medium Point by Monteverde
Schmidt 6040 Fineliner Spring Loaded Refill - Blue, Medium Point 1.0mm, 1 Pack (SC58118)