We are professional supplier and manufacturer of ceramic foundry sand. We can provide best service and ... produce and use, environmentally friendly, while offering improved performance based upon a better refractory rating, lower specific gravity, and ... , 25, 30, 35, 40, 50, 60, 75, 80, 100, 125, 140, or 0.2~0.6mm, 0.3~0 ... -65AFS:75≤105-2525-4520-40≤10≤575-85AFS:100≤310-3035-5515-35≤10≤2105-115AFS:125≤20 ...