HomeHPLC - Mass SpecWB399WB399 WB399 Add to quote This product is already in your quote request list. Browse the list Description Description WB Scientific Part WB399 OEM Part 700002596 Models ACQUITY® I-Class BSM, ACQUITY UPLC® BSM, nanoACQUITY UPLC® BSM/ASM Description: UPLC Primary Check Valve Assy, 2/pk