Concrete Aggregates

37.5mm (1 ½”) Concrete Stone
A minus 50mm (2") to 26.5mm (1") clear stone used in production of ready mix concrete. 
  
19.0mm (3/4”) Concrete Stone
A well graded blend of 19mm (3/4") and 13.5mm (1/2") and 7mm (1/4") clear stone products used for the production of ready mix concrete. 

13.2mm (1/2”) Concrete Stone
A well graded blend of 13.2mm (1/2") and 7mm (1/4") clear stone products used in the production of Pre Cast or Ready Mix concrete.  Its smaller size allows it to fill tighter areas that larger stone is not able to.