Pen syringe

This is the syringe that attaches onto the insulin pen. It is also about a 1/2 in. It is covered by two caps. At the bottom of the syringe are grooves that allow it to screw into the insulin pen. This kind of syringe can only be used with insulin pens. I give myself shots with this syringe in my stomach and my arms. I haven't tried my thighs yet because the insulin pen is bulkier than a normal syringe, which creates weird angles.