Rockboard 60 boards have a dimension of 24" x 48" x 2" inches and are manufactured by ROCKWOOL. It is rigid mineral wool board similar to Owens Corning 705 at a density of 6 pounds per cubic foot.

Rockboard is rigid but not very strong, similar to styrofoam in strength.

Rockboard 60 is a great option for acoustic projects that require a rigid material.

If you need 4 or more pieces, order ROCKWOOL Rockboard 60 Case of 4 here.

For more detailed information, see Selecting the Right Acoustic Material for a comparison of these materials.