Hot Rocks is the improved alternative to using Lava Rock on your gas BBQ, with all the advantages and none of the inconvenience, hazards associated with lava rock. The Outback Hot Rocks are nonporous so do not absorb grease, eliminating the possibility of grease fires or cross-contamination of food smells. Their consistent shape enables user to guarantee even distribution within each basket, improving heat and cooking performance when compared with lava rock. Outback Hot Rocks are locally manufactured from slate, ceramic and a fine mix of oakwood particles with purified charcoal. The mix is then hardened giving a consistent shape and finish. The distinctive flat shaped bottom of each rock ensures each piece sits flat in the Hot Rock basket. The sloped top allows grease to either run off into the drip tray/grease cup or evaporate into the meat giving that great char