The official Sony replacement parts store no longer stocks this part. Since my earphones were so worn, I was hesitant to choose a third-party company to replace the pads. I was also concerned about the quality of a third-party replacement, given that these earphones cost over $300 when new. However, these replacement pads exceeded my expectations in terms of easy installation and comprehensive instructions. The quality of the earpads is comparable to the original ones, and the sound quality and fit were not affected. I’m very happy with my purchase.