DWK Life Sciences 28019-50 Flask,Volume,Classa,Bulb,Stopper,50ml, KIMBLE®, 6/Unit - 09-523 | Genesee Scientific DWK Life Sciences 28019-50 Flask,Volume,Classa,Bulb,Stopper,50ml, KIMBLE®, 6/Unit - 09-523 | Genesee Scientific