The infusion set itself is generally distinguished only by the material, the adjustment device, and whether or not it is provided with a drug addition port. The specifications 0.55 and 0.6 do not seem to indicate this, but when the set of infusion sets includes a scalp needle, the specification of the scalp needle is A variety of different number represents the different thickness of the needle, the smaller the number of needles is smaller (smaller diameter), different thickness of the scalp needle is generally different from the color of the needle.
