G2, G3, G4, G5, G7, 37mm ROC, 13mm ROC, overburden. 63 Ballast. n/a. n/a. Armour rock, rock fill, rock core, spalls, rubble grade 4. Southern region Find the products at all our quarries in Saldanha, Cape Town, George, Knysna and Port Elizabeth. Quarry name Aggregate size Sand Base Railway...