DWK Life Sciences 28016-50 Flask,Volume,Classa,Raysorb,Ptfe,50ml, KIMBLE®, 12/Unit - 09-504 | Genesee Scientific DWK Life Sciences 28016-50 Flask,Volume,Classa,Raysorb,Ptfe,50ml, KIMBLE®, 12/Unit - 09-504 | Genesee Scientific