ZK International's Subsidiary xSigma Announces NFTs Launches for NBA Players Dwight Howard and Michael Beasley on the xSigma NFT Marketplace, while the industry sales surpassed $1 billion in Q1 2021 News provided by Share this article (PRNewsfoto/ZK International Group Co., Ltd.) Co., Ltd. (Nasdaq: ZKIN) ("ZKIN", "ZK International" or the "Company"), xSigma Corporation, a blockchain R&D lab, which is a subsidiary of ZK International, is pleased to announce the upcoming Non-fungible Tokens(NFTs) sales on its own NFT marketplace. Professional NBA players Dwight Howard of the Philadelphia 76ers and Michael Beasley of the Los Angeles Lakers will launch their NFTs exclusively on the xSigma Marketplace.