Amazon.com : Lanier Combo Pack - 8 Genuine Schmidt 635M ISO 12757-2D, D1 Ballpoint Pen Refills, Compatible With Swarovksi Crystalline Pens also included are 8 Plastic Tops Included - 4 Black and 4 Blue (Assorted) : Office Products
Schmidt 635 Mini D1 size ballpoint refill - Lanier Pens
25 - Pen Refills for SWAROVSKI Crystalline Pens & Schmidt 635 M - BLUE INK | eBay
Amazon.com : 8 X Schmidt 635M Mini Ball Pen D1 Size Refills – Blue Ink and one Removable Black end Cap. : Office Products
How to change pen refill for Swarovski Crystalline pen - YouTube