Marine Kettle 17" Party Size Gas Grill with Hinged Lid. Magma's Marine Kettle 17" Party Size Gas Grill was designed for economy without sacrificing functionality. Made of 100% 18-9 mirror polished stainless steel, it will give you the safety, durability and performance required of a marine grill. It uses Magma's time-tested, highly efficient radiant plate heat distribution system in conjunction with convection heating technology to achieve hot, even temperatures while using a minimum of fuel. It