1.centrifuge tube with screw cap ,molded graduations,10ml,PP 2.2200PCS/CTN 3.withISO9001,CE,FDAcertificate 4,L/C,T/T centrifuge tubeCentrifuge tubes produced by "Changlong" are using high quality polypropylene,it won't rupture when high speed centrifugation10ml centrifuge tube with rounding bottom.The printed groduation can make the liquid precisely.And the screw cap will be more tighter. ...