The RekTipz 12mm Large Color Tip is the perfect reusable glass rolling tip for your joints and blunts alike! These borosilicate glass tips provide a "screen" effect, keeping your herb in your joint and not in your mouth. They also act as a filter to help cool your smoke before it hits your mouth, making it a more pleasing smoking experience. These tips are reusable and are easy to clean by soaking in an isopropyl alcohol or acetone cleaning solution and then running a pipe cleaner through and rinsing in cool water. This tip is size large in length and 12mm in diameter, making it perfect for joints and blunts alike and they are reusable, making stops at the store to buy a pack of disposable tips a thing of the past!