Nalgene 295-3345 瓶顶过滤器-500ml容量,MF75TM系列，聚苯乙烯外壳，75mmPES滤膜，孔径0.45um,适合瓶颈尺寸33mm BTLTOP PES 33MM 500ML 75M;.45U Labware and Bottles 12 12 1434