The glass on glass diffused downstem features 6 slits, 14mm ground joint, and 14mm slide joint. Length from bottom of ground joint to diffused bottom is 3 inches (7.6cm).Highlights:14mm male ground joint14mm female slide joint3 inch lengthDiffuser downstemBorosilicate glassClearThe glass on glass diffused downstem features 6 slits, 14mm ground joint, and 14mm slide joint. Length from bottom of ground joint to diffused bottom is 3 inches (7.6cm).