Standard ISO 6432 establishes the specific dimensions of the cylinders up to the 25 mm bore. Despite this, in order to offer technicians further possibilities in the choice of cylinder, AIRON has widened the range of the BA series introducing the 32, 40, 50 and 63 mm bore, producing them in a "round form" that makes them less awkward and particularly "clean profile". Proposed in the basic BAS version, with a magnetic BAM piston, with a magnetic piston and the adjustable pneumatic cushioning BAC, all the models have the obstacles in common and the same design principals of strength, reliability and pleasant appearance.