The erythrocyte sedimentation rate (esr) is the rate at which red blood cells sediment in a period of one hour. aqra esr tubes are preferred for this hematology test. aqra esr tubes are in conformance to international dimensions of bore which is the critical parameter to determine the esr values.
westergren pipettes
made with uniform bore non-staining borosilicate glass tube with permanent - accurate marking to find out erythrocyte sedimentation rate.