The pulpit is tubing, not pipe, so it either 1" OD or 7/8" OD. It can be bent, but is hard to bend if what you are trying to do is actually straightening an existing bend. For the 7/8" tubing a 3/4" EMT bender will probably work the best. For the 1" a 3/4" Ridgid pipe bender would work better. The tough part is not kinking it. The benders used to make these rails have shoe that fits the tube exactly, and a half round follower block that fits the tube exactly. This keeps the tube from collapsing. However they don't straighten tubes well at all.
Gary H. Lucas