Solid cable that doesn't drag on you and with some "shaving" by the pins you can get these to fit moondrop iems or any other ones that are very recessed (looking at you final audio).
NYCrucialI use the copper cable with my mass drop Zeus iems, works fine,no problems. I also use the cable on my noble audio massdrop iems. The copper brings a warm extra bass to K10s and Zeus. Good inexpensive cable.