... type -Dia: 3/6,4/9,6/12,12/24mm Old craft W,X type mosi2 glass heater rod with firm ... with use and resistance changes, also is not aging, so old and new components can be mixed use.MoSi2 heating element ... length won’t change with the use time, so the old and new elements can be mixed use. C. Installation: MoSi2 ...