Matrix 13.5cm, 1 1/8" diameter quill stem with a 15-degree rise, 25.4mm bar clamp diameter. Used, $30.00/each

• Actual rise: From the level of the quill's minimum insertion mark to the center of the bar is 7cm.
• This stem was made by HL for Matrix

From the side

Here's the same stem turned over.

Front and underside

Back and top of the stem