Multiple objects being edited in edit mode I've tried googling this but I don't even know how to word it. I'm fairly new to blender and i've just been using it to edit some models slightly. I've come across a problem on some of the model. 

This model was taken from a .x3d file I've imported and wish to edit, whenever I select any of those cylinders and tab into edit mode, they all tab into edit mode. Anything I do to one, effects the others, and this is undesirable. Is there anyway I can stop this from happening?

Thanks a lot 

Let me know if there is anything else you need me to add.
I think they have linked data, they share the same mesh and whatsoever you are doing to one applies to the others. So either press U and select Object &amp; Data


or press the number that shows how many objects share the data (on the right in the red circle)