• 

  Rhomberg Electronics SP221

• 

  Rhomberg Electronics SUMLINE SP-220 replaced by the SP221

• 

  Sumitomo TNMG 221 ENJ TNMG 110304N-UJ

• 

  Sumitomo TNMG 221 FNJ TNMG 110304N-UJ

• 

  Kraus & Naimer CG4 A221 -600 FS2

• 

  Nabco 895 221 060 4

• 

  Salzer M221-647685

• 

  Sabroe 2353.221

• 

  Filtrec R221T60

• 

  Wago 221-413 (pack 1x50)