Model D Indoor Rower. Concept II. Used on the following models.
Concept II Model C D E Rower Top Seat Roller Hardware Replacement 1727
Concept II Model C D E Rower Bottom Seat Roller Replacement Part 1725
Concept II Model C D E Rower Bottom Roller Under Monorail Seat Part 1733
Concept II Model C D E Rower Seat Roller Wheel 3.25 Inch Part 1728
Concept II Model A B C D E Indoor Rower Seat Top 1929
New Concept 2 Model C D E Rower Nickel Chain with Connector, Swivel