... ServiceLifetime technical support and accessories supply. 1, Heating by gas,diesel or electric 2, 12,16,32,64 trays optional ... rubber; 4,Double layers glasses easy clean;5, "Olympia" (Japan) burner are durable ,powerful,and energy saving;6, Interior and exterior ... baking;8, Adjustable door rubber seal, saving energy;9,From single trolley to double trolleys, can meet 400X600mm or 460x720mm tray ...