Medical-grade stainless steel hypodermic tubing (needle tube blank), typically made of SUS304 or SUS316L and compliant with ISO 9626, is a slender, open-ended tube without a needle tip. It serves as upstream raw material for finished medical needles—such as injection, blood collection, and IV cannula needles—requiring cutting, tip grinding, polishing, cleaning, and sterilization prior to clinical assembly.