链霉亲和素修饰聚苯乙烯磁珠，2.5 -3.5 μm, 2.5% g/mL 水分散液, proclin300 ≤0.1%

Streptavidin modified polystyrene magnetic beads, 2.5 -3.5 μm, 2.5% g/mL dispersion in H2O, proclin300 ≤0.1%