it clips a standard pureover glass diffuser onto the side wall of a hario to facilitate mindless gentle pouring. it has a secure clamping mechanism and is suitable for size 02 or 03. choose the size to meet your need.
the glass diffuser is fully interchangeable with the drip controller, so just buy the clip on arm if you already have control.
it is made of heat resistant, food safe polypropylene extruded through stainless steel.
