11 inches is an odd size. When I found these I went ahead and bought them, I should have looked harder. They are very cheap, made of thin and light metal. Very loose, sluggish, lots of up and down movement. The draw had a very noticeable drop at the end of the extension. I thought I screwed up the installation. Bought the kit for 5.00 less than compared before installing, they were much better quality and work great.