This listing is for 4 packs of Sarstedt # 55.484 Reagent / Centrifuge tubes, 500/pack, factory sealed in space-saving compact stack packaging. 

These tubes are polystyrene, 12 mm x 55 mm, 3.5 ml capacity, with round base.  Maximum centrifugation speed is 5000 x g. 

These tubes accept a variety of Sarstedt push caps (with or without skirt), but are supplied without cap.

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