• 

  Pem (Power Electronic Measurements) CLS-M4-2 (1 Pack = 100 Pcs)

• 

  Pem (Power Electronic Measurements) F-M4-2 (1 Pack = 100 Pcs)

• 

  Pem (Power Electronic Measurements) SP-M4-2 (1 Pack = 100 pcs)

• 

  Leuze IHRT 46B/4.21-S12

• 

  Bitzer 372 421-02 obsolete replacement 372 422 01

• 

  NGK INSULATORS KX-621-a421c

• 

  Stanley 1-42-421

• 

  AUDION SP 421

• 

  MAC VALVES 421A-BOA-DM-DFFJ-1KB9 mod.416K

• 

  Copeland ZR61K3E-TFD-421