NEW- Waters Performance PLUS Sapphire Check Valve Cartridge, #700000254, 2 pk. admin NEW- Waters Performance PLUS Sapphire Check Valve Cartridge, #700000254, 2 pk.. Condition is New. Shipped with USPS.Please send your offers. All of them are being reviewed.GiMiTEC.infoAAS, Column, consumable, GC, GiMiTEC, HPLC, spare part 21 September, 2020