6F2 6F5
6F2 and 6F5. This is a product produced in the same way as GSB, but is bigger – typically 100mm to 125mm or 4" to 5" in old money, but which can be compacted to form the base for a road. Confusingly the terms 6F2 and 6F5 refer to a similar product i.e. a 4"-5" Crusher Run but one being produced from quarried material and the other ...
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