It is composed of a stainless steel core， a soft outer tube and a plastic needle . 

When puncturing, the outer tube and the needle core are pierced into the blood vessel together.

 When the tube is sent into the blood vessel, the stainless steel needle tip is drawn out, and the 

soft outer tube is left in the blood vessel for infusion through the outer cannula, It is an safeinfusion tool.

Size： 14g，16g，18g，20g，22g，24g，26g

Type:  Safety IV. cannula，Standard IV. Cannula( pen type, with wings type, with injection port type)