• 

  Rhomberg Electronics SP221

• 

  Rhomberg Electronics SUMLINE SP-220 replaced by the SP221

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  Nabco 895 221 060 4

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  Sumitomo TNMG 221 ENJ TNMG 110304N-UJ

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  Sumitomo TNMG 221 FNJ TNMG 110304N-UJ

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  Wago 221-413 (pack 1x50)

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  Wago 221-412 (pack 1x100)

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  Wago 221-415 (pack 1x25)

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  Filtrec R221T60

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  Brevetti 445MU100100 (4,221 m)