Each of our dispensers come with 3 free end caps so you can use different diameter size rolls on each dispenser. Wrapping paper rolls are usually wrapped onto a thick cardboard tube or core. Each specific style of wrapping paper has a different diameter core, with counter rolls having the smallest. The end caps fit into this core at each end of the roll so when you thread your roll onto the centre rod, the rolling weight remains even and turns easily when you pull your paper through the cutting blade. You do not have to use these end caps, but they do make the roll easier to move and more durable when in use.