聚乙烯 (PE) 滤头，20μm 孔径

聚乙烯 (PE) 滤头，20μm 孔径, for use with 6mL SPE Tube, pk of 60

聚乙烯 (PE) 滤头，20μm 孔径, for use with 20mL SPE Tube, pk of 40

聚乙烯 (PE) 滤头，20μm 孔径, for use with 3mL SPE Tube, pk of 108

聚乙烯 (PE) 滤头，20μm 孔径, for use with 1mL SPE Tube, pk of 216

聚乙烯 (PE) 滤头，20μm 孔径, for use with 60mL SPE Tube, pk of 32

聚乙烯 (PE) 滤头，20μm 孔径, for use with 12mL SPE Tube, pk of 40