A super popular insulator. A must for any collection. A bunch of vertical ridges (I didn't count them). The insulator is very, very near perfect. I did find a spot where three of the ridges have the slightest roughness. This is just one spot and the roughness is about 3/8' long and on three ridges. Certainly no big deal but I want everyone to know that I look the insulators over pretty well. Asking $65 and that includes the shipping anywhere in the U.S. or Canada. that's cheaper than the last one I sold on ICON.