Check Valve Cartridge for GBC LC 1155 & SHIMADZU LC-3, LC-4, LC-5 & SHIMADZU LC-6, LC-6A & SHIMADZU LC-8 & SHIMADZU LC-10 AS & SHIMADZU LC-10 AT & SHIMADZU LC-10 ATVP, Prominence LC-20AT & THERMO SEPARATIONS Surveyor LC