75-150mm Rock (D50=100) 

10-300mm Rock (Coefficient of Uniformity grater or equal to 5) 

d50=150mm (100-300mm Rock) 

d50=200mm (100-400mm Rock) 

d50=250mm (150-500mm Rock) 

d50=300mm (200-500mm Rock)  

d50=400mm (300-600mm Rock)  

d50=500mm (200-800mm Rock) 

d50=600mm (500-900mm Rock)  

d50=900mm (500-1400mm Rock) 

d50=1000mm (700-1500mm Rock) 

300-500mm Rock 

Other sizes available upon request