Correct Plus - Fast Set Automix Putty 4-Pack. Hydrophilic Impression Material. Formulated with proprietary nano-particulate fillers for enhanced performance. 45 second working time, 2-1/2 minutes total set time. Outgasses in as little as 15 minutes for timely pour of models. 4-Pack contains: 4 - 50 mL Cartridges and 16 Mixing Tips. 4 pack refill