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Hollowtips cartridges are one-of-a-kind, designed with a passion for cannabis, innovation, and craftsmanship. High-grade, lab-tested THC water clear extract is delivered from a patented bullet-shaped cartridge, that is fully equipped with a 510 thread connection and leak-proof technology. Our patent-pending air-bubble chamber expands smoke during use for a highly satisfying experience. Cartridges come with collectible magnetic bottom caps. Together these special features and impeccable quality create a lasting impression.