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Slack is a cloud-based team collaboration tool co-founded by Stewart Butterfield, Eric Costello, Cal Henderson, and Serguei Mourachov.

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Featured Sets

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Sets are groups of collectibles that relate to each other. These might be specific Lines, or release Waves.

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Featured Collectibles

  • Passion Projects T-Shirt - Country Pigeon Gray

    Released in 2016

     

    0 Listings

  • The Slack Sock

    Released in 2016

     

    0 Listings

  • Slack Sticker Multi-Pack

    Released in 2016

     

    0 Listings

  • Slack Wooden Coaster Set

    Released in 2016

     

    0 Listings

  • Slack Stickers

    Released in 2016

     

    0 Listings

  • Passion Projects T-Shirt - Clean Albatross White

    Released in 2016

     

    0 Listings

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