... medical grade PVC; 2.Size:300ml,500ml etc; 3.Model:common type,anti-reflux flutter type,male type;Product Name ... translucent, whiteProduct Category:screw valve, T valve, push-pull valveProduct Model:Type A ( common type), type B (anti-reflux flutter type ), type ... validity is two years, prohibit the use of expired products; 4. Should be stored in a dry, ventilated environment; Applicable Scope:Used for ...