Radial sealing ring 15x25x5. Models: MS 211 MS 211 C-BE MS 231 MS 231 C-BE MS 251 C-BE MS 251 MS 251 C-BEQ MS 271 MS 271 C-BE MS 291 MS 291 C-BEQ MS 291 C-BE BR 350 BR 430 BR 450 C-EF BR 450