... lubricated and not lubricated QGBJI Series Cylinders: This series of cylinders are standard pneumatic cylinder, with complete specifications and wide ... Material: steel5. Origin: Zhejiang, China6. Model: QGBJI- pneumatic cylinder7. Brand: LongdaProcess Flow Chart:Our Slogan: regarding ... 2008 Quality Assurance System, the USA UL. 4. Products covering hydraulic cylinders, pistons, flanges, valves parts, ...