MM adapters
On the outside multimode adapters differ from single mode adapters only in terms of colour. The color coding is made so that when connecting, the type of fiber on the other side of the adapter can be deduced from the colour. The colour of the adapter for OM1 fiber is beige, for OM3 fiber it's aqua and for OM4 fiber it's magenta.
Multimode adapters
OM1 (GK) -adapters
SC/SC

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7262372
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SC/SC OM1-simplex-adapter, for SC-UPC-connectors
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Colour beige
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One Piece model

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7262373
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SC/SC OM1-duplex-adapter, for SC-UPC-connectors
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Colour beige
OM3-adapters
SC/SC

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7269008
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SC/SC OM3-simplex-adapter, for SC-UPC-connectors
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Colour aqua

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7269009
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SC/SC OM3-duplex-adapter, for SC-UPC-connectors
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Colour aqua
OM4-adapters
SC/SC

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7269002
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SC/SC OM4-simplex-adapter, for SC-UPC-connectors
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Colour magenta

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7269003
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SC/SC OM4-duplex-adapter, for SC-UPC-connectors
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colour magenta