Set of 24 Ceramic Pebbles for Firepit or Fireplaces in Gray Each pebble approximately 2 by 3 inches round Perfect for all Ethanol, Gel, Electric, Propane, Ventless, Vent Free, Vented and Gas Fireplaces and Propane Firepits. Can be used with or instead of Gas Logs Ember Glow and Glowing Embers Indoor and Outdoor Safe but should not be left in rain Includes 24 Ceramic Pebbles Can be replace or be used with lava rocks in fireplaces or fire pits