Elegant Square Aluminum Balusters by Titan Building Products. Made from T6063 aluminum and powder coated for exceptional longevity and beauty. Buy baluster ten packs in 31" or 25" lengths and use your own baluster connectors.
Or better yet, buy the Snap'n Lock™ Baluster Kits that include the sideways mounting Snap'n Lock™ connectors and save a few dollars - and a ton of time and avoid the frustration of using traditional plug style connectors.