Products: needle buckle: plastic seat precision dispensing nozzles are all Seiko, inner diameter error about 0.01mm, all steel are using unique technology, no flash processing, polishing and achieve internal and external wall pipe chamfering to ensure the accuracy of the liquid out eliminate drawing, double helical locking pin holder and large-scale rotating design, not only with the more secure and easier disassembly (according to customer requirements into the elbow needle-nose)