Currently we can make 2 type of ISO6431 standard pneumatic cylinders; one is DNC pneumatic cylinder, which is the same sizes and mounting with Original DNC type, the other is our OWN standard ISO6431 style we call it SI pneumatic cylinder, which is selling very good in Euro Market; both cylinders have the same mounting sizes, As some of our engineers were worked in FESTO,SMC before, so we are familar with the goods and their quality standard, a lot of customers are buying these cylinders to replace FESTO, SMC,CAMOZZI or other brand cylinders.