(149u-40u) Solventless Live Rosin Cartridge Our Live Rosin Cartridge are some of the most flavorful cartridges available today. Pure and uncut. Just like our live rosin fresh press and cold cure batters we collect the most sought after trichome heads using the 149u-40u micron screens and press them into rosin to create a sauce for our solventless live rosin cartridges. Using heat and no additional additives we create a terpene rich, high THC, full-flavored sauce that is ready to grab and go.