"K2" series twin hollow piston rod pneumatic cylinders are actuators that move a load in a linear way and allows to transfer a general gas (air-vacuum) from two special ports "A-C" on the read end cap along the piston rods "B-D". These important features allow to operate without any pipe around the working area. They are available in 3 sizes (40,50,63 mm) and are cushioned and arranged in order to use magnetic switches. Main dimensions are like ISO 15552 standard cylinder except for the piston rod thread, therefore they can use the same fixing accessories.
The K2 series cylinders are a valid alternative to holed through rod cylinder as they have dimensions longitudinally more compact.
The following drawing explains an application where a double acting hand gripper is working using the air from the piston rods.