Amazon.com: Care Touch CTPN31316 Pen Needle, 31 Gauge, 3/16" Size, Pack of 100 : Health & Household
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Easy Touch Easy Touch® Pen Needles – 50 count, 29g, 1/2″ (12.7mm), Green – Easy Touch Store
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Amazon.com: UltiCare Insulin Pen Needles for at-Home Insulin Injections, Compatible with Most Pen Injector Devices, Size: 4mm (5/32”) x 32G Micro, 50 Count : Arts, Crafts & Sewing
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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