The BD insulin syringe with the BD Ultra-Fine 6mm needle features our shortest insulin syringe needle at 53% shorter than the 12.7 mm needle. In a 2010 study, 80% of patients preferred shorter needels compared to 8mm and 12.7mm needles. They also deliver insulin, more reliably, into the subcutaneous tissue, reducing the risk of painful intramuscular (IM) injections.