BD Micro-Fine+ Pen Needles are precision-engineered insulin pen needles designed for comfortable insulin delivery. These 31G needles measure 5mm in length and come in a box of 100 pieces, featuring specialized technology for enhanced patient comfort during injections. The 31G (0.25mm) ultra-fine needle gauge combined with the 5mm length provides an optimal balance between effective insulin delivery and minimal injection discomfort. These needles are compatible with most insulin pen devices and are designed for single use only. Each needle comes individually sterile packaged for safety and hygiene.