... s suitable for restaurant ,home ,snack bar .. electric grill with lava rockmodleCZ-335size870*1100*700mmpowe 9kwvoltage 220v/110v 50hz/60hz ... systems of delivering the heat, almost always coming from gas. Lava rock is the most common and gives ... rock at all, but to have upward-facing gas jets that are shielded by a protective steel shroud ... . This system is easier to clean. electric grill with lava rock