A carb cap, which is sometimes referred to simply as a dab cap, is a domed lid, that can be made from a variety of different materials, that fits snugly over the bowl of a dab rig or bong. A good dab cap helps to efficiently regulate airflow and promote better vaporization of concentrate.
Most carb caps fall into one of two categories, either a directional carb cap or a bubble carb cap. A directional airflow carb cap has a small hole or slit in the side which allows the user to control the direction of airflow. This type of carb cap is ideal for use with smaller dabs, as it helps to prevent waste. Bubble caps are designed with a small chamber which fills with air as the user inhales. This creates a bubbling effect and also helps to cool the vapor. Bubble carb caps are best used with larger dabs, as they provide more surface area for vaporization. Regardless of which type you choose, carb caps are an essential tool for any concentrate connoisseur.
A carb cap is an important tool for anyone who enjoys dabbing concentrated forms of cannabis. By capping the carb, you are essentially reducing the amount of airflow that enters the piece. This in turn slows down the cooling process, allowing your rig to reach the optimal temperature for a longer, more potent hit. In addition, dab carb caps help to prevent all those wasted dabs by ensuring that all of the concentrate is vaporized, rather than being wasted through evaporation. Whether you're a beginner or a seasoned pro, a carb cap is an essential accessory for any dabber's toolkit.