Rainin SD200, SD300 / Varian Prostar 210, 215 Piston Seal 5 mL/min. with Back up Seal.

This seal is suitable for all applications, however because it contains a Stainless Steel expansion coil, the pumps should not be left idle for an extended period of time with halide containing buffers.  Rinse pumps with an alternative halide-free buffer or with pure water.