Rio Negro grain 2-3 mm
Rio Negro 5-8 mm
Rio Negro river sand 0-2 mm
Sahara Storm grain 1-2 mm
Samurai Pebble 2-7 cm
Samurai gravel grain 3-5 mm
Samuraikies gravel grain 5-7 mm
Samurai gravel grain 7-9 mm
Black Pearl grain 5-6 mm
