We got this stuff in the store due to popular demand. Scratch that, due to the insistence of my partner, Dirk Fischbach, who is currently on a tear of making his own leaders, and making them the old fashioned way. Well known for its hardness, Mason Clear Mono is clear. It's perfect for building tough leaders, especially those needing an extra oomph in the butt sections.
We don't carry all the diameters yet, but we will.