九九欧美I国产精品亚洲成人Iwww.av免费观看I91精品成人久久I中文av网站I国产精品免费高清I国产淫aI天天av资源

Product features:

1. The international standard 1 / 4-28 thread can be directly connected to the luer connector interface, and the syringe can be used for arbitrary injection;

2. The contact material with liquid is PTFE, which is resistant to organic solvent and has good compatibility;

3. Imported from Britain to ensure product quality;