5 lb - Dental Yellow Buff Stone, Type III Lab Stone Yellow - Model Stone for Dental Laboratory and Dental Office;

All-purpose model stone for articulating, flashing, and master models. Water/Powder Ratio: 30ml/100g; Working Time: 6-8 minutes; Setting Time: 15 minutes; Setting Expansion: 0.15%; Compressive Strength (1hr): 28 MPa (4,000psi); Compressive Strength (dry): 56 MPa (8,000psi)