Pellets ,made in basalt rock wool, have been developed and realised in a particular shape in order to be environment friendly product (avoiding direct handling and clouds of basalt dust) and to decrease the total costs. In fact, besides reducing considerably carriage cost, pellets allow a faster and fully automatic muffler filling process. Efficiency of this solution is already proved and it's has been tested from an important OEM automotive manufacturer in Europe. Rock wool pellets presents the following benefits: * Lower carriage cost: In light of pellets higher density, it's possible to load on a container much more kilos than rock wool delivered in rolls. * Environment friendly: The process is very easy and generates no clouds of basalt dust. It can be enough to fill, through big sacks/carton boxes of rock wool pellets, a silos (with a trap-door in the bottom part) which is emptied directly into the muffler body. In this way it's possible to avoid rock wool handling and it's not necessary to cut the rolls of rock wool. * Thermo-acoustic insulation: excellent space fitting and muffler filling properties. Pellets are made in cylindrical shape with length and diameter from 25mm to 30mm. Material delivered in big plastic bags or carton boxes.