GL1000GR Color: Gray Features: -Can be replace or be used with lava rocks in fireplaces or fire pits. -Indoor and outdoor safe but should not be left in rain. -Perfect for all ethanol, gel, electric, propane, vent less, vent free, vented and gas fireplaces and propane fire pits. Can be used with or instead of gas logs ember glow and glowing embers. -Each rock is unique and does not have the same measurements. -Includes 24 pebbles. Product Type: -Accessories & Kits. Primary Material: -Ceramic. Number of Products in Set: -24. Pieces Included: -24. Country of Manufacture: -United States. Dimensions: Overall Width – Side to Side: -6″. Overall Depth – Front to Back: -3″. Overall Product Weight: -1 lbs. Overall Height – Top to Bottom: -8″.