D1 Refills Ballpoint Blue or Black Ink Compatible with Swarovski Element Crystal Pen by NEO+ (5 x Ink)

Instructions how to change refills in Stardust pen are here: https://www.youtube.com/watch?v=nhegCzEoimc https://www.youtube.com/watch?v=X3R_zSN9iEk this shows how to change in crystalline pen Stainless steel tip, Colour: Blue Compatible with Swarovski and other brands crystal pens Length: Approx. 7.0 cm Width: 2.0 mm