Needle SeatHPLC Replacement Parts, Pump Parts SpecificationsW&B Part #WB11125703Comp. to OEM #405011492, Old# 405008397Product DetailsNeedle SeatCompatibilityBrands (OEMs)ModelsWatersACQUITY H-Class Bio SM-FTN, ACQUITY H-Class SM-FTN, ACQUITY I-Class SM-FTN