TechLITE Standard Insulin Pen Needle 4 mm Length - Simply Medical
Easy Touch Easy Touch® Pen Needles – 50 count, 29g, 1/2″ (12.7mm), Green – Easy Touch Store
Comparing Insulin Pen Needles
Evaluating the User Performance and Experience with a Re-Engineered 4 mm × 32G Pen Needle: A Randomized Trial with Similar Length/Gauge Needles | Diabetes Therapy