Color-Coded And Length-Specific Options: The Kit Is Organized With Specific Color-Coded And Length Options For Ease Of Identification And Use. It Includes 10Pcs Of 18G 13Mm Green And 20G 13Mm Pink Needles, 10Pcs Of 18G Green 13Mm Total 30Mm, 20G Pink 13Mm Total 30Mm, And 16G Grey 13Mm Total 30Mm Needles, And 10Pcs Of 18G Tt Green, 20G T Pink, 14G T Olive, And 16G Tt Grey Needles. Furthermore, It Includes 10Pcs Of 18G Threaded 38Mm Green And 15G Threaded 38Mm Amber Needles. Secure And Leak-Proof Connection: The Needles Feature A Threaded Luer Lock Design, Ensuring A Secure Attachment To Needle And Preventing Out. This Design Makes Them Ideal For Industrial Use Where Precision And Reliability Are . Versatile Applications: Suitable For A Broad Spectrum Of Uses, These Precision Dispensing Needles Are Perfect For Glue Dispensers, Ink Refilling, And Oil Applications. They Cater To The Needs Of Both Hobbyists And Professionals, Providing High-Quality Dispensing In Diy, Lab, And Professional Industrial Settings. Colour:As Shown Material:plastic Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 set * luer lock needle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.