W1 Classic Approx. 4 Lid: Double-chambered steel screw Frame: 5 claws non-slip frame 130MM panel: special thick non-magnetic stainless steel Function:Safety flame failure protection Size:300x380M W2 nine-chamber units about five firepower Fire cover: copper core nine-chamber fire Hearth: Thickened five claw tap stand Panel: particular thick non-magnetic stainless-steel Function: safety flame failure protection Size:300x380MM W3 nine-chamber hearth models about 5 firepower Lid:Copper core nine chambers fire Hearth: White metallic poly flame windproof grate Panel: more thick non-magnetic chrome steel Function:Safety flame failure defense Size:300x380MM