Available for a wide range of clinical applications involving hypodermic needles. Including: medication delivery via syringe injections or TB testing, immunizations, insulin injections, allergy testing, delivery of pain medication and local anesthetics. Hypodermic Needle-Pro® devices are available in needle gauge sizes 18-30g and in needle lengths 1/2" to 1 1/2". Needle hubs and product packaging are color coded to simplify product storage and selection. Compatible with both Luer slip and Luer lock syringes and are ideal for intramuscular and subcutaneous injections. Compatible with Luer slip syringes. Safety feature completely rotates to facilitate intradermal injections and does not contribute to additional dead space to standard needle/syringe injections. SI4290 23g x 1" needle. SI4294 23g x 1 1/2" needle. Needle hub color is deep blue. Packaged: 100 Each per Box; 8 Boxes per Case.