Scope of application : Used in combination with the Injector and injection pump and used for injection Treatment of vein medicine .Small residual quantity :the Residual quantity of standard of prolonged duct with a Length of 160 mm(including filter)shall be less than or Equal to 1mI, which not affect injecting medication to the Vein with small dosage Strong pressure - resistant capacity :no deformation bearing a service pressure of 0.2 Kpa , It Is acceptable for the matching application with domestic And imported injection pump , without the emergence of Alarming phenomenon .High filtering precision: as it is of High filtering type and fitted with a terminal liquor Filter with a pore of 3 um , it will be good for reducing The ache of patients limb vessels when injecting :the Effect shall be especially obvious when injecting fructose , mannitl, etc. That have relative strong pungency for Clinical child and the newborn respectively.