The glass on glass diffused downstem features 6 slits, a 14mm ground joint, and a 14mm slide joint. -The length from the bottom of the ground joint to the diffused bottom is 4". The length from the top of the ground joint to the diffused bottom is 4.95" . The complete downstem length is 6.5". These downstems accommodates a 14mm herb bowl or banger.