⅝” minus basalt is a crushed gravel that compacts well. ⅝” minus is also called crushed surfacing top course or CSTC. As one of our top sellers, this product has many uses. ⅝” minus is used in driveways, under concrete pads, in shops, and under boulder walls.

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1 ¼” minus basalt is a crushed gravel used for a base. 1 ¼” minus is also known as crushed surfacing base course or CSBC. 1 ¼” minus is used in soft or muddy driveways or pathways where ⅝” minus would be too small.

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