Following are among the generally used304 Stainless Steelcartridge heaters, please click on the dimensions to go to the proper specification page. Also, the warmers would be tradition for various sizes, power and voltage, when you need, please contact with us freely. 17mm Tube Diameter Length25-35mm38-48mm50-60mm62-75mm80-95mm98-115mm120-135mm140-160mm165-185mm190-220mm225-255mm265-300mm320-360mm380-500mm 18mm Tube DiameterLength25-35mm38-48mm50-60mm62-75mm80-95mm98-115mm120-135mm140-160mm165-185mm190-220mm225-255mm265-300mm320-360mm380-500mm 20mm Tube DiameterLength25-35mm38-48mm50-60mm62-75mm80-95mm98-115mm120-135mm140-160mm165-185mm190-220mm225-255mm265-300mm320-360mm380-500mm 22mm Tube DiameterLength25-35mm38-48mm50-60mm62-75mm80-95mm98-115mm120-135mm140-160mm165-185mm190-220mm225-255mm265-300mm320-360mm380-500mm 25mm Tube DiameterLength25-35mm38-48mm50-60mm62-75mm80-95mm98-115mm120-135mm140-160mm165-185mm190-220mm225-255mm265-300mm320-360mm380-500mmIf you need more size,please link here to find:Tube Dia. 6-9mmTube Dia. 9 Dia. 12 Dia. 17-25mm Cartridge Heater 18*120/125/128/130/135mm 680W-750W 304SS Heating Element 110V/220V/380V 5pcs/lot Specifications: Product Name: Cartridge HeaterMaterial: 304 Stainless SteelTube Diameter: 18mmTube Length: 120mm/125mm/128mm/130mm/135mmWire Length: 300mm(11")Power: 680-750WVoltage: 110V/220V/380VPackage: 5pcs/lot 18mm Cartridge Heater Pay attention: Power Allowance -10%~+5% Shopping Tips: 1: Suitable for abrasives heating. Common Application Industry:Core taking pictures Machine,packaging machinery,flat vulcanizing machine, and so on spot isn't relevant to liquid and air heating, non-standard item can touch us for custom. 2. How to return to a choice the proper specifications? 1)Voltage: (110V/220V/380V/12V/24V and so on)2)Wattage: (there is error -10% - +5%)3)Tube Diameter:(The default diameter is a detrimental tolerance. For example:10mm is 9)Tube Length: (The default diameter is +/-2mm)5) High Temperature Line:(Default 300mm) 3. About Non-standard customization Instructions:Please verify the specific parameters earlier than ordering the customer induced the mistake, the corporate does not help the return. Instructions for use:1. Before use, please measure the ability on multimeter. If there is not any problem after measured then can be installed. If there isn't any power, please touch with us. The cartridge heaters ought to be related with the right wiring method, wiring errors could cause slow heating or damage two standard wiring tricks of shoppers are as follows: SHIPPING NOTICEAll functions from our store are registered site: 17track/en, PAYMENTVISA,Mastercard,WESTERN UNION,Maestro,Bank Transfer,QIVI WALLET,WebMoney,Boletol,PayPal WARRANTY SERVICEDelivery Time:Ship out inside 3-5working daysAll emails could be spoke back within 24 hours REFUND or RESENDIf items not acquired or damaged,please cooperate with us to take photographs once you get preserve of it, then present us the evidence,we will refund or resend a new one to you,thanks FEEDBACKAny questions please feel free contact with us earlier than you leaving a feedback,we will attempt the best that will provide help to resolve it Immediately.