Ready to Finish Square Gas Fire Pit Kit - 48" (48" x 48"), Electronic Ignition (Natural Gas). Square ready-to-finish fire pit kits are made from Fiberock® and G90 marine-grade galvanized steel framing. These can be finished on-site to match your landscaping, hardscaping, or exterior design. Popular materials include granite or Supercast™ concrete for the top, and stone or stucco for the base. Special order - contact us for a quote.