Product information "Piston Seals, Reverse Phase, 2/pk for Thermo/Dionex systems - please see compatibility below"
Models: Ultimate 3000 RS/SD pumps, ISO-3100SD, HPG-3200SD, HPG-3200RS, HPG-3400SD, HPG-3400RS, LPG-3400SD, LPG-3400RS, DGP-3600SD, DGP-3600RS
Compatibility: Thermo™/Dionex™ DGP-3600RS, DGP-3600SD, HPG-3200RS, HPG-3200SD, HPG-3400RS, HPG-3400SD, ISO-3100SD, LPG-3400RS, LPG-3400SD and Ultimate 3000 RS/SD
Specifications: UHMW-PE, 316 SS Spring
Comparable to OEM # 6040.0304
Compatibility: Thermo™/Dionex™ DGP-3600RS, DGP-3600SD, HPG-3200RS, HPG-3200SD, HPG-3400RS, HPG-3400SD, ISO-3100SD, LPG-3400RS, LPG-3400SD and Ultimate 3000 RS/SD
Specifications: UHMW-PE, 316 SS Spring
Comparable to OEM # 6040.0304