FIRE GLASS - Add a bold accent to your propane gas or electric firepit, fire bowl, or fireplace with these fire pit rocks. The glass rocks are approximately 1/2in square each, and the 10lb container covers a 12 x 12-inch area to a depth of 1.5-inches. FIRESAFE MATERIAL - These fire pit stones are made of tempered glass that emits heat without creating ash or smoke and without melting or degrading, for long-lasting beauty. Note: Do not use firepit glass with wood-burning or ethanol fires. ATTRACTIVE ACCENT - This reflective firepit glass rock creates a dancing flame effect, upgrading the aesthetics of your outdoor firepit, fire table, or indoor fireplace with a range of unique color options and finishes to match your personal décor style. VERSATILE USE - These blue fire pit glass rocks can also be used as landscaping rocks to add a pop of unique color and texture to your garden, or you can use these fun fire pit accessories as vase fillers or in other DIY home décor projects. PRODUCT DETAILS - Materials: Fire Glass. Dimensions: 10lb Container; Individual Piece: (L) 0.5” x (W) 0.5” x (H) 0.5”. Glass Must Be Completely Dry Before Use. Adhere to Fire Pit Instruction Manual. Do Not Block Burner Exhaust Holes. Color: Cobalt Blue.