I'm not conversant on what seats fit into what aircraft, but since these are both rather early seats, I'm suspecting they are for Hunters and the like. Both seats are very nicely molded and have the curtain handles separate from the rest of the seat. Harnesses are molded integrally with the seats so no need for additional harness materials. Remove the tiny amount of flash that is pretty well standard with any resin set, paint them up and they are ready to install in your next kit.