Our company is specialized in producing electric heating series(cartridge heater), We are manufactory, have CE certification if u interest in any products,you can contact me by my msn:cnhszj@hotmail.com       Skype:cnhszj            Email:cnhszj@gmail.com         Contact:MS.LILIAN ZUO Cartridge heating element transfers heat efficiently and uniformly, one lead end, adopted highly quality material and rigid technology. Apply to sealing plastic, mould, platen etc. the minium diam of the cartridge heater is 2.5mm. the length and the watts and volts and other requirements are needed by the clients