McKesson Prevent HP Safety Lancet 21 Gauge Retractable Push Button Activation Finger - 2000 Count CaseSafety Lancet McKesson Prevent HP 21 Gauge Retractable Push Button Activation Finger Green in color, defines 21 needle gauge 1. 8 mm depth Automatic needle retraction and lock out ensure sharp edge is enclosed before and after use Convenient, intuitive, one step activation for precise and consistent results Color coded design for quick and easy identification Ready to use right out of the box; no set up required Ergonomic, rounded shape and no slip