The Cheech Glass 11-inch Marble Slide is a downstem, the part that carries smoke from the bowl down into the water. It uses a single-hole diffuser to break the smoke up as it enters the water, which smooths the draw compared with a plain open end, and a marble accent gives it a bit of style. At 11 inches it's a longer downstem, suited to taller pieces. Check your bong's joint size and the length you need before buying, since a downstem has to match the piece. A simple replacement or upgrade from a brand known for its glasswork.