20 and 21 appear to be a bearing and a seal, the OP's parts are not a bearing and a seal. It would help greatly if you told us what area you were working on the bike, what repairs or maintenance you were performing.
My guess is the rear wheel, as the front doesn't use a big ny-lock. Center item is probably the wheel spacer that lives on the right side of the wheel in the dust seal up against the bearing. Item on upper right looks like swingarm spacer that lives in swingarm opening by the pinch bolt.
Definitely rear wheel...
Once the wheel/spline is set into the final drive the "fat" one goes from the inside into the RH leg/clamp of the swing-arm, then its smaller counterpart (cleaned) into the (re-greased) wheel bearing seal... then the axle...