40° L - Briess Malting - Caramel 40L is used in some Pale Ales and most Amber Ales. It can also be used in darker beers, as well, when you are looking for the benefit of Caramel malt and some color contribution, but not the caramel notes that the higher colored Caramel malts have.
Also known as Briess Crystal 40L
See attached Document for Typical Malt Analysis