We have needles and holders,compatibility with vacuum blood collection tubes. Sterilized by E.O. which is bacteria and heat source free.There is no evident difference on the blood specimen variation influence between the two types of needles,users could choose either type according to specific situation.
Needles type:
pen type needles 18-23G
butterfly single wing type needles 5.5-12#
butterfly double wings type needles 5.5-12#
