Use Wilton's Red Ready-To-Use icing tubes for quick easy decorating. These tubes can be used with the Wilton Tip and Nail Set or Coupler Ring Set and any Wilton standard size metal tip. Remove the cap, choose your tip, place it on the icing tube and screw a standard coupler ring onto the icing tube. When finished just remove your tip and replace the cap. Colors match Wilton icing colors. Cerified Kosher 4.25 OZ tube.