Heavy pneumatic cylinder QGBZ,QGA,QGAII,QGB,QGBII,JB series QGBZ series pneumatic cylinder belongs to new pattern design, are all in line with the national standard ISO/6430. Sturdiness and durability, which two sides are with adjustable cushioning device, and also used widely. 1. Bore:50 / 63 / 80 / 100 /125 /160 / 200 / 250 mm2. Stroke:normal 1-3000 mm, extra stroke is avalaible.3. Single ...