GlucoRx Safety Pen Needles ultra-sharp, polished needles with thin walls allowing enhanced insulin flow. Needle is hidden after use. Compatible with all insulin pens. Gluco Rx Safety Pen Needles 30g/5mm are ultra-sharp, polished needles with thin walls allowing enhanced flow to pr more comfortable injection. The needle is automatically hidden in a safety shield after use to prevent needle stick injuries and cross contamination. Key Features of Gluco Rx Safety Pen Needles Universal fit Automatic safety shield cover protects needle tip after use Ultra-sharp, polished needles with thin wall allowing enhanced flow Simple to use Compatible with all pens