钳口顶空瓶组合盖垫20mm银色磁性开口铝盖中心孔8mm本色特氟龙/黄色硅胶隔垫

钳口顶空瓶组合盖垫20mm银色磁性开口铝盖中心孔8mm本色特氟龙/黄色硅胶隔垫

Crimp-top headspace vial caps and septa20 mmsilver magenetic aluminum capnatural PTFE/yellow silicone septum