6F4 Capping is mainly used a sub-base for roads and buildings although it has many other uses such as Piling Mats and general backfill.
6F4 has a finer grading than 6F5.
Please note that the stones are measured at the narrowest point. The sizes used on the page therefore refer to the technical measurement. Because the gravel is measured at the narrowest point, the actual size may vary slightly.
