The T41 is suitable for Earphones with a catheter diameter (widest) of 4.4-5.8 mm. The T41 is suitable for Earphones that use a single moving coil unit such as KXXS/Spaceship/Starfield/MiRai. (Unspecified Earphones can consult customer service).
T55 inner diameter 5.5mm
The T55 is suitable for Earphones with a conduit diameter (widest) of 6-7mm. The T55 is suitable for Earphones with multiple unit designs such as the S8/Solis/Blessing 2/A8. (Unspecified Earphones can consult customer service).
