These spokes are for 2019+ Mavic Ksyrium Pro Carbon SL UST Disc wheels.  These spokes are black stainless steel and include washer and nipple. 

Ksyrium Pro Carbon SL UST Disc 2019+

Front and Non-drive Side:  V3666301

Drive Side:  V3666401

If you are unsure which spokes you need to order or are unsure how to determine the model and/or year of your wheel,  here's a short video about what I use to ID a Mavic wheel.