Altmann Analytik Check Valve Cartridge, for Waters model 510, 515, 600, 610, 1515, 1525, 2690, 2690D, 2695, 2695D, 2795

equivilant to Waters® 700000254 (2 of 289000144) for model 510, 515, 600, 610, 1515, 1525, 2690, 2690D, 2695, 2695D, 2795, Alliance®