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The most common and recognized type of syringe is the U-100 syringe. These syringes are meant to be one time use only thus the low cost. The U-100 indicates the concentration of your meaning there's 100 units of in every 1 mL.

Needle bore. The hole down the middle of the needle is known as the bore. In general the bigger the needle, the larger the bore butsome of the finer needles – such as the neversharesyringe – have a smaller bore so that the wall thickness, and strength, can be maintained.

The gauge (abbreviated as “G”) of a needle refers to the size of the hole in the needle. The higher the gauge, the smaller the hole.

Definition. Syringes and needles are sterile devices used to inject solutions into or withdraw secretions from the body. A syringe is a calibrated glass or plastic cylinder with a plunger at one and an opening that attaches to a needle. The needle is a hollow metal tube with a pointed tip.

The Barrel—The barrel forms the body of a syringe that houses the plunger. It's typically graduated, which means the markings indicate accurate measurement volumes. The majority of barrels are made out of clear, see-through plastic.

Needles in common medical use range from 7 gauge (the largest) to 33 (the smallest).

A needle's inner diameter describes the size of the needle's lumen (the hollow bore that runs the length of a needle).