Kato N 20050 3" To 4-1/4" Expansion Track Unitrack

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Kato N 20050 3" To 4-1/4" Expansion Track Unitrack
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Current Stock Level: 141


Telescoping track section expands from 3" to 4-1/4" 78 to 108mm.
Kato's line of ground level Unitrack offers a variety of pieces and turnouts to allow you to build any layout your heart desires, all while ensuring track quality and steady delivery of electricity to your locomotives. Available both as individual pieces and as track sets, let Kato Unitrack be the first track you put down, and you may never use another track again.

Includes One 3" To 4-1/4" Expansion Track

Nickel Silver Rail
Realistic Looking Roadbed
Unijoiners Lock The Track Sections Together Firmly and Evenly
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8 Reviews Hide Reviews Show Reviews

  • 5
    Kato Expansion Track

    Posted by Phillip Grice on Jul 15th 2019

    A Must for anyone using KATO Unitack.

  • 5
    Kato N 20050 Expansion track

    Posted by Shiva Rao on Dec 11th 2018

    Not only useful for connecting small gaps , but can be used for joining and disconecting tracks when using two modules.

  • 5
    I love these

    Posted by Michael Armstrong-Smith on Jun 29th 2018

    These work like magic. If you have awkward little gaps to bridge you want one of these.

  • 5
    Kato N 20050 Unitrack 3" - 4-1/4" Expansion Track

    Posted by PhilipS on Jun 29th 2018

    These are a must for NTRAK modules. Keep a dozen on hand for spares. NTRAK.org.

    Use between modules and next to bridges to allow for expansion and contraction.

  • 5
    Kato Unitrack

    Posted by Ed B. on Jun 29th 2018

    The KATO Unitrack makes track work a breeze. No soldered connectors or soldered connecting power feeder wires.

  • 5

    Posted by Frank on Jun 29th 2018

    KATO track made excellent, looks good and as you figure to use it is a little unforgiving but everything runs well on it.

  • 5
    Expansion track

    Posted by Victor Merino on Jun 29th 2018

    The best way to join tracks on your modular layout.

  • 5
    Expansion track

    Posted by Nick on Apr 12th 2018

    Greatest invention for sectional track! This is the perfect piece to complete a loop and you are a tab short. It’s adjustable and works great. One of the most handy piece of track for the Unitrack system