The Gravity™ EF II with Piezo ignition is an incredibly stable and simple LP gas stove for those who want a small stable stove and appreciate the simplicity of using LP gas. Thanks to Primus' preheating coil the stove can even be used at low temperatures. Gravity EF has a built-in piezo igniter and comes with a windscreen. Delivered with a windscreen heat reflector and nylon stuff sack. The Gravity EF comes with or without a piezo igniter.