Quantity: 50 pcs 21G butterfly infusion needles per pack Individually Sealed: Each butterfly needle is individually packaged to help maintain cleanliness prior to use. Unopened needles can be stored for up to 5 years under appropriate conditions. Reliable Construction: Made with 304 stainless steel tubing and a polypropylene hub for structural stability and smooth insertion. Application: Suitable for laboratory sample collection, research environments, and veterinary use. Disposable: Single-use only. After use, immediately discard in an approved sharps container or puncture-resistant biohazard waste container.