Single use w/retracting hidden needle. Gamma-sterilized w/Sterility tab. Ultra thin needles w/low vibration during activation. Color coded. Easy to use Pre-loaded, simple twist off, top pull out top & press to finger to activate. All 100/Bx 20Bx/Cs #1101-30gx1.5mm #1102-28gx1.8mm #1103-26gx1.8mm #1104-23gx1.8mm #1105-21gx1.8mm #1106-21gx2.4mm #1107-18gx1.8mm UNSPSC#41104102