Chain is sterling silver and bar is aluminum, polished to a high shine.
The horizontal bar is approximately 1.5" long and is 1/4" wide. It is hand cut, sanded and stamped with an awareness ribbon. 
You can choose your chain length of rhodium, sterling silver Italian box chain.
Matching earrings are available:
https://www.itsallaboutyouamy.com/product-page/cancer-awareness-earrings-1
https://www.itsallaboutyouamy.com/product-page/cancer-awareness-earrings