21 Gauge (Purple) - 10 Length 50 pieces of high quality dispensing needles. We offer many lengths and gauges with a blunt tip at the end. And have a Luer Lock hub to ensure a good fit to a Luer Lock syringe. Not sure what size to get? Order the “All Gauges” and get one of each gauge blunt needle to test. Great for glue alcohol liquid measure liquid mixture sealants Craft glue essential oil dispenser ink refill wood adhesive perfume measure lubricants and etc. Engineered Fluid Dispensing Suitable for Most Luer Lock Syringes We offers a large selection of needles that are compatible with Luer Lock syringes. Luer Lock is an industry standard tapered termination utilized by most industrial syringe manufacturers. Luer Lock needles are common because their design is controlled by a series of universal standards which guarantees compatibility between manufacturers. Note: These needles are for Mechanical/Arts and Crafts use ONLY.