Amazon.com : Schmidt 635M Single BLUE Refill for Swarovski Pen with Plastic Refill Holder : Office Products
Amazon.com: 8 X Schmidt 635M Mini Ball Pen D1 size Refills – BLACK Ink and one removable black end cap
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