GC LiSi PressVest is an easy and fast phosphate bonded investment for press ceramic techniques. Hydrofluoric acid treatment and alumina blasting are not required for the removal of the reaction layer. GC LiSi PressVest provides a stable handling under various temperature conditions (19–25°C/ 66-77°F). GC LiSi PressVest provides secure investing with a high flow and a longer working time. Contains 60pcs 100g bags of powder.