Difference between Flashback Needle and Pen Type Needle:
Flashback Blood Collection Needles have an Visible Window for Medical Use , the special design can observe the vein blood flash back.
(1) Flashback Needle
Color:Green,Black,Blue
Gauge:21G,22G,23G
◆(2) Pen Type Needle
Color:Pink,yellow,Green,Black,Blue
Gauge:18G,20G,21G,22G,23G
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