1 Crimson = 1,1 Tonnen (2200 lbs.) pro Kubikyard. 2 Rock (57 & 89) = 1,2 Tonnen (2400 lbs.) pro Kubikyard. 3 Kalkgestein (919) = 1,25 Tonnen (2500 lbs.) pro Kubikyard. River Rock (alle) = 1,325 Tonnen (2650 lbs.) pro Kubikyard.