Flame King YSN201BT Steel Floor Buffer Cylinder Propane Tank with Vapor Valve and Level Gauge, 20-Pound For use on propane powered floor waxing, burnishing and polishing machine that use propane. Comes with convenient installed propane level gauge, so you can always tell how much propane you have. Powder coated for long lasting exterior protection Newly designed all-in-one multi valve Powder coated for long lasting exterior protection, high grade steel welded construction