螺纹样品瓶组合盖垫8mm白色开口聚丙烯盖中心孔5.5mm预切口红色特氟龙/白色硅胶隔垫

螺纹样品瓶组合盖垫8mm白色开口聚丙烯盖中心孔5.5mm预切口红色特氟龙/白色硅胶隔垫

Screw thread vial caps and septa8 mm white pp capcentre hole 5.5 mmpre-slit red PTFE/white silicone septum