Compatibility Guide - BOB Revolution Flex Duallie

 Car Seat  Car Seat Adapter
Britax/BOB B-Safe 35, Chaperone, B-Safe, B-Safe 35 Elite, B-Safe Ultra, Endeavors
Britax adapter
Chicco KeyFit, KeyFit30 and Fit2
Chicco adapter
Graco SnugRide Click Connect 30, 30LX, 35, 35LX and 40; SnugRide Classic Connect, 30, 32, 35

Graco adapter

Peg Perego Primo Viaggio 4-35 and 4-35 Nido
Peg Perego adapter