For 99 Classics, 99 Neo, Liric, or any headphone with 3.5 mono plugs.
I just wanted a balanced 4.4mm connection from my Stellia headphones to my portable HipDac 3. Every once in a while I use the HipDac while doing chores around the house. This cable is not the uber expensive pure silver but I knew I didn’t need it for this purpose. Very nice cable. I love it. Beats the socks off the stock 1/8” connection cable that came with the Stellia.