The Elite ZER2 Two Pens / Two Erasers / One Cradle Set for Whiteboards & Screens is compatible with the Elite WhiteBoardScreen Series, Elite WhiteBoardScreen Universal Series, Elite Insta-DE Series and Elite Insta-DEM Series. The ZER2 set features one blue pen, one red pen, two high-density erasers and one self-stick cradle that easily attaches to your whiteboard or removable screen for quick, simple storage of the included pen and eraser set.