DWK Life Sciences 28019-500 Flask,Volume,Classa,Bulb,Stopper,500ml, KIMBLE®, 4/Unit - 09-524 | Genesee Scientific DWK Life Sciences 28019-500 Flask,Volume,Classa,Bulb,Stopper,500ml, KIMBLE®, 4/Unit - 09-524 | Genesee Scientific