ITEM NAME:CDJ2B 16-30 16mm Bore 30mm Stroke Stainless Steel Mini Pneumatic Air Cylinder 100% brand new and high quality. Double action, 16mm bore and 30mm stroke. Specifications: Material:Stainless steel The cylinder diameter:16mm Bore : 16mm Stroke:30mm Theory Force:40 (N) Weight:30g Quantity: 1 Pc Note: 1.Please allow 1-2cm error due to manual measurement..Double action, 16mm bore and 30mm stroke. Bore : 16mm. Material:Stainless steel. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Also note that monitor settings may vary from computer to computer and may distort actual colors.