habitat et jardin Steve 1332_ 83771 Manuel D'instructions page 16

Step 6: Install the Saddle and Seat Post.
Place the Saddle (27) over the Seat Post (6), secure in place with the
Flat Washers (15) and Nylon Nuts (11) which are pre-attached to the
Saddle.
Slide the Expansion Sleeve (29) onto the Seat Post, then insert the
Seat Post into the Main Section, adjust to a proper position, secure in
place with the Pop-pin Knob (28)
EXERCISE MONITOR INSTRUCTION
MANUAL