This is a multi-site, prospective, open-label, randomized, 2 period cross over study comparing the subjects' current 32G pen needle (four groups of pen needles) to the BD Nucleus pen needle. The study will consist of two 15 day periods ( in which the subject will use each pen needle [BD Nucleus pen needle or subject's current pen needle, order randomized] for injection. At the end of the last study period, each subject will be asked to evaluate his or her perceptions using a 150mm relative VAS scale.