Token GXP bottom bracket adapters. These are made for Token BB's to converts BB made for 24mm crank axles to the 22mm left side GXP standard.
They also work on some other bottom brackets on other brands. However please dont buy to try and return. Buy if you are happy taking the risk. I can offer no advise on use with other brands of BB.
TK877/878 is a road/MTB thread bb for hollowtech II cranks.
BB841T-46/A is PF30/PF30A standard.
BB841T is BB86