1. SMN-25 rock wool is the mineral fibers that is extensively applied in industrial fields without public harm.

2. appearance: white color with soft sence.

3. rock wool can be used in friction material as the primary ingredient of fiber reinforcement. the reinforcing effect of it can meet the demand of machanic strength of friction material products.

4.rock wool can meet demand of friction characteristics of friction materials.

5. excellent heat-resistance.

6. suitable price, obviously cheaper than that of steel fiber.