The SL40 is a 14 column staggered 40% keyboard.
Make example for this keyboard (after setting up your build environment):
make wsk/sl40:default
Flashing example for this keyboard (after setting up your build environment):
make wsk/sl40:default:flash
See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.