The OSPW System for Campagnolo 12-speed EPS comes with a compact molded carbon fiber cage for light weight and durability. The system offers a three spring tension setting that allows for optimal setup based on riding conditions. 
 
Like every other CeramicSpeed Oversized Pulley Wheel System, this is developed, designed and handbuilt in Denmark.
 
The product comes with both CeramicSpeed Standard and Coated pulleys with a lifetime warranty on the coated version and 4 on the standard version. 
The system is not compatible with 12-speed mechanical.