TSN-AR66HL Adapter ring compatible with:TSE-14WD 30x WW for TSN-660/600/82SV TSE-21WD 20x WW for TSN-660/600/82SV TSE-14WE 30x WW for TSN-820/820M TSE-21WE 21x WW for TSN-820/820MHigh Lander eyepiece TSE-21WH (21x WA with original eyecup) High Lander eyepiece TSE-14WH (32x WA with original eyecup)