Insulin syringes were the only commonly used way of delivering insulin for much of the 20th century. Towards the end of the 1990s, insulin pens became more commonly used.
Easy Comfort Insulin Syringes - 32G 1 cc 5/16 100/bx
UltiCare Insulin Syringe 28 Gauge, 1cc, 1/2 Needle - 100 Count
Insulin Syringe
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Syringe - Wikipedia
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0.5cc Insulin Syringe, 29G x 1/2, Safety, BD SafetyGlide™, 100
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SALIUS Insulin Syringes, Usage: Clinical, Hospital, Laboratory at Rs 3.25/piece in Navi Mumbai
Converting U40 insulin units for U100 insulin syringes — RayMed