Stainless steel for 9’ ceilings 36” wide my range is 30” so i wanted 3” overhang on both sides to catch the smoke 900 cfm generally i operate it on the lower settings since 900 cfm setting is overkill for a typical residential use not too loud this one is around 55 decibels at the max speed oil catcher steel baffles instead of a mesh so that it could be popped into the dishwasher for easy cleanup and it had to be reasonably priced