Source:http://linkedlifedata.com/resource/umls/id/C0181987
UMD: Needles designed to transfer medication from vials in hospital pharmacies. These devices are short, blunt needles (typically 1.6 cm [5/8 inch]), long enough to penetrate the vial stoppers but short enough to remove all medication. They are usually of 20 gauge to provide high flow rate with minimum coring.