... . 3,The life time is more than 1000 times. 1,4 ports plastic pneumatic fittig.2, Sleeve with oval shape and ... .3, Each and every pcs was tested at 10kgs/cm2.4,Chipware is zinc.5, Inner seal can bear 75 degree ... treatment and the life time is more than 1000 times. 4 ports plastic pneumatic air fittings