... 6,4/9,6/12,12/24mm Old craft W,X type mosi2 glass heater rod with firm welding point ... , the surface heat to generate a pre-pressing quartz glass, it can keep the membrane products, no longer oxidation ... and resistance changes, also is not aging, so old and new components can be mixed use.MoSi2 heating ... won’t change with the use time, so the old and new elements can be mixed use. C. Installation ...