I've used in the past the 1602 Eagle Salvage Drum on a cyclone with good results . 30 gal. is all I want to deal with at once . It has a metal clamping ring that seals well . Eagle also has the 1601 Overpack Drum , which is 2 lbs. lighter , and has a plastic clamping ring . Has anybody tried a dust barrel w/ a plastic ring like this , how did it seal ? Any opinions out there ? It's $25 less than the heavier " Salvage Drum " .