comes with triple layer showerhead and 8 tree perk for better diffusion and filtration for smoother hits. Phoenix Star percolator tube is 21 inches tall and constructed of 5mm thick glass for durability. This perc tube features glycerin coil which is connected with the base by a plastic kick clip. You can put the removable freezable glycerin coil in your freezer for one to two hours before starting a sesh. The cooler and smoother smoke will not let you down.