Compatible with: Any 14mm Water Pipe The Human Grade Downstem is a versatile and durable replacement, designed to fit any 14mm water pipe for a seamless experience. Available in multiple sizes, it ensures optimal airflow and filtration for smooth hits. Each package includes a printed ruler to help measure your downstem and joint size for the perfect fit. Retail Unit: One (1) Downstem Sizes: 5.5" Joint Size: 14mm Ruler printed on packaging to measure your downstems and joint sizes so you can find the perfect replacement