宽口螺纹样品瓶组合盖垫10mm黑色开口聚丙烯盖中心孔7mm预切口白色特氟龙/红色硅胶隔垫

宽口螺纹样品瓶组合盖垫10mm黑色开口聚丙烯盖中心孔7mm预切口白色特氟龙/红色硅胶隔垫

Wide opening screw thread vial caps and septa10 mm black pp capcentre hole 7 mmpre-slit white PTFE/red silicone septum