1.Material: brass and stainless steel 2.Action form: single action Strucure 3.Good quality and low price 4.Similar SMC ... .Our products including listed:Cylinder Series:DNC,SQcylinder, SI,SC,SU standard cylinder DSN Series ISO6432 cylinder, ADVU, SDA,CQ2B compact ... , Muffler, Air gunAir Press Punch, Vane PumpHydraulic Ball Valve double action cylinder/pneumatic air cylinder