Have a beautiful Shimano PRO Vibe UD Carbon Stem. 110mm. Used 4 times only - in perfect condition. This stem uses the puzzle clamp V system to secure the front of the stem and the body is not the typical circular shape, it is more rounded-triangular for optimum stiffness to weight. Weighs 115 grams. This stem new is $255 and the cheapest I have seen on Amazon is $145.
Exact stem of choice by many pro teams including Sky, Giant-Shimano, BMC
Pm for pics.