Flexitime Dynamix Heavy Tray Refill: 2 - 380 mL Cartridges, 2 Dynamix Mixing Tips & 1 Fixation Ring. Vinyl polysiloxane impression material optimized for the Dynamix automatic mixing machine that emphasizes precise impressions and accurate prosthetics. Homogeneous and void-free mixing gives assurance of precision and fitting accuracy. 2 - 380 ml cartridges & 2 tips