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Amazon.com: BH Supplies Insulin Pen Needles 31 Gauge - 3/16", 5mm (Pack of 125) : Health & Household
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Ultra-Fine Insulin Syringe 31 Gauge 3/10cc 5/16 inch Short Needle-1/2 — Mountainside Medical Equipment
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MCK-Insulin Syringe with Needle SafetyGlide™ 1 mL 31 Gauge 15/64 Inch Attached Needle Sliding Safety Needle Box Of 100 - drugsupplystore.com
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