I use a combination of a Hoover Commercial PORTAPOWER Lightweight Canister Vacuum and a Sanitaire by Electrolux Lightweight Commercial Upright Vacuum. I believe they are mostly all metal parts and they do sell replacement parts, though I've never needed them. I've yet to find a mess these two can't handle and the cords stretch easily over several rooms. I like having the canister vacuum for dusting and portability and it handles all my hard floors, though the sanitaire doesn't do a bad job for an upright. I didn't like buying two at first but it has ultimately worked out better.