Resin reinforced natural gypsum die materials. Apex offers a choice to compliment any technique. Perfect for all crown and bridge applications as well as implant or precision attachment cases. Resin additives eliminate brittleness and add superior external hardness. The exclusive Apex flow agent allows for excellent stackability, while promoting free material flow during vibration. 18,500psi., 128 MPA, 10-13 min. Set Time, 0.10% Expansion