1. Precision point glue needle of plastic seat is made by seiko, and its stainless steel needle tube is polished without rough edges, which can realize accurate glue production and avoid drawing. 2. The base of screw needle on plastic seat adopts double helix locking and large area rotating design. The double-threaded joint can be connected with the point rubber cylinder safely, which not only makes it safer to cooperate but also easier to disassemble. 3. The diameter error of the needle shall not exceed 0.01mm, and the diameter of the ultra-fine 34G needle shall be reduced to 0.06mm;
| Specifications | Inner diameter（mm） | Outer diameter（mm） | Colour and lustre |
| 14G | 1.45+-0.03 | 1.82+-0.02 | Olive |
| 15G | 1.37+-0.03 | 1.80+-0.02 | Amber |
| 16G | 1.25+-0.03 | 1.60+-0.02 | Black |
| 18G | 0.84+-0.03 | 1.27+-0.02 | Green |
| 19G | 0.7+-0.03 | 1.05+-0.02 | Black |
| 20G | 0.06+-0.01 | 0.91+-0.02 | Pink |
| 21G | 0.51+-0.01 | 0.82+-0.02 | Purple |
| 22G | 0.41+-0.01 | 0.71+-0.02 | Blue |
| 23G | 0.33+-0.01 | 0.64+-0.02 | Orange |
| 25G | 0.26+-0.01 | 0.51+-0.02 | Red |
| 26G | 0.24+-0.01 | 0.46+-0.01 | Black |
| 27G | 0.20+-0.01 | 0.41+-0.01 | Wood |
| 30G | 0.16+-0.01 | 0.31+-0.01 | Pale purple |
| 32G | 0.10+-0.01 | 0.24+-0.01 | Yellow |
