... 1000mm,1200mm length:1000mm--4000mm thickness:25mm-150mm Rock wool for thermal insulation Rock wool felt is a kind of soft and ... product made of rock wool felt wrapped by wire netting, stainless steel netting or glass wire, mainly used for heat preservation of ... shape components, boilers, vessels, pipe fittings.It can be used for continuous operating temperature up to 650°C,and works particularly ...