Packaging information: You will receive 20 pieces of 4-inch dispensing needles with inner diameter tolerance of no more than 0.01mm; please note that our blunt tip needles are not for medical purposes, only for industrial purposes Exquisite design: The needle adopts double helix lock and large-area rotation design, which is not only safer, but also easier to disassemble Widely used: fill in ink or oil, electronic components, hobby crafts, etc. Suitable for all standard luer lock syringe Warm note: the product is not sterile, should not be injected, and the needle is blunt