SUMBOW INSULIN PEN NEEDLES 31G-4MM 100PCS.
• UNIVERSAL FIT - securely fits on all Type A insulin and medication pens.
• HIGH QUALITY - EO Sterilized, non-toxic, pyrogen free and protected with outer cover and easy peel off tab.
• 100 INCLUDED PER BOX: Conveniently includes 100 pen needles per box.
Follow the usage instructions listed on the box.