Home / Recreation / Exercise Cycle Seat Post 004-9815 Exercise Cycle Seat Post 004-9815Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: 004-9815 Brand: NAUTILUS Seller: Sears PartsDirect Category: Recreation Description This seat post (part number 004-9815) is for exercise cycles. Seat post 004-9815 holds the seat. Wear work gloves to protect your hands when installing this part.