Prime Fly New Age Euro Leader 13.5' with Tippet Ring
This is a leader of my custom design. 

The base is 13.5' with a true Cortland Bi Color Indicator and a 2mm tippet ring. 

To fish, add 1.5-2x the water depth you plan to fish with your tippet of choice. 

This leader is hand tied in Pennsylvania and supports two small business.