How thick is Arc Lite's Cordierite stone? 13 February 2026 15:07 The Arc Lite stone is 12mm/0.5" thick. Related articles How long does Arc Lite take to heat up? What materials are Arc Lite made from? Can I use wood in the Arc Lite? What’s the difference between Arc Lite and Tread? Is Arc Lite a replacement for Roccbox or Tread?