1g jar of Sunshine premium 90u Rosin. -- What is 90u Rosin?: Refers to rosin composed of trichomes collected between 90u-149u on only the first washing cycle, resulting in a higher terpene content, providing a tastier experience. Throughout the wash process there are 3 collections of trichomes. 90u Rosin is made from the very first collection. This is where the most terpenes come through.