How thick is Arc Lite's Cordierite stone? 13 February 2026 15:08 The Arc Lite stone is 12mm/0.5" thick. Related articles Can I buy a replacement stone for Arc Lite? Is Arc Lite part of the Arc Series? Is Arc Lite a replacement for Roccbox or Tread? What warranty does Arc Lite come with? What components of Arc Lite are removable/replaceable?