Unistik 3 Extra 21 Gauge Safety Lancet with increased penetration depth for increased blood sample. Gauge: 21G Depth: 2.0mm High Blood flow Safe The Unistik 3 needle point is hidden before use and automatically retracts after use to avoid accidental needle stick injuries and cross infection. Unistik 3 has an additional visual lockout feature. Should an attempt be made to misuse the device, there is a clear indication to the operator that the device has been used and should be disposed of in a suitable sharps container. Unistik can not be re-used or re-primed. Easy to use The Unistik 3 range is colour coded for easy recognition. Unistik 3 is pre-set and ready for use. Just twist off the protective sterile cap and take the sample. Maximum comfort Side firing action to provide extra comfort for both patient and professional. Unistik 3 features unique Comfort Zone Technology that allows ultimate control and comfort when lancing by targeting the sensation and perception of pain. This masks the pain of lancing to maximise comfort.