Discover the versatile Cross Slim Rollerball Refills, perfect fit for pens such as the Cross Click, older versions of the Cross Classic Century and Spire. Available in two classic colors - Blue and Black - these refills offer a reliable and smooth writing experience. The Cross Slim Rollerball Refills deliver effortless and consistent lines whether you're taking important notes or writing creatively. The deep blue shade adds a touch of style to your writing, while black maintains a timeless and professional look.