Nozzle: 1.75/0.4mm throat hole:4.1 Thermistor:100K NTC B 3950 ±1% ,length 1 m Heating Tube: 12/24V 40W 1m Throat length: 30mm Teflon tube:ID2 OD4mm 1m Material: Aluminum Installation Type: External Thread Connection Operating temperature range: -40~+260°C (-40~+500°F)