LifeSpan MF-4000 Owner's Manual page 9

STEP 4:
a) Secure 1x Back Cushion (#4) to 1x Pad Tubes (#5) with:

4x Hex bolts M8 x 40mm (#27)

4x Washers Φ8 (#26)
b) Secure 1x Seat Pad (#7) to 1x Main Support Tube (#6) with:

4x Hex bolt M8 x 35mm (#28)

4x Washers Φ8 (#26)
c) Place 1x Foam tube (#30) onto 1x Front Support Tube (#8) with:

1x Knot M10 (#31)
d) Place 2x Foam onto 1x Foam Tube, secure with 2x Tube Plug.
9
MF-4000 Weight Bench