30/40/48mm OD 3/5V/12V/18V/24V/220V 1 HTCC Alumina PTC Circular Round Instant Heat Plate MCH Metal Ceramics Heater Quantity:1Piece Heater three is three ℃ Base Plate Material: Multilayer Aluminum Oxide Ceramic,а-Al2O3≥95%Lead Wire: Nickel WireSleeve: PTFEResistance Material: TungstenVoltage: 3 Resistance: 0Ω Outside Diameter:30mm/40mm/48mm