... the merits of reasonable structure, tight sealing, heavy-duty and esay operation. Users only need to adjust the position nut ... liquid packaging industries.2"&3/4" (70mm and 35mm) drum flange and plug for 200-liter(55 US gallons) drum/barrelMaterial: ... ), can making, lubricant, paint manufacturing , chemical, petroleum, grain&oil and other liquid packaging industries. Drum flange and drum plug/bung