Features of the NRS Stern Seat Mount The seat mount rests on the raft stern tube, elevating the angler for better visibility and casting The included High-Back Swivel Seat lets you fish in comfort all day long The padded seat swivels easily for the best seating angle The side rails curve to follow the raft tubes, keeping the stern compartment open and clear The Stern Seat Mount is offered in three stock sizes. Follow the directions in the bottom paragraph to determine the size for your boat. The Small sizes Are designed for 54in. or narrower frames. The Large is for 60in. and wider frames. We've added the Small - 39in. version for AIRE Puma rafts, which take 48in. or 54in. wide frames and need the longer stern rails The NRS Raft Stern Frame Anchor System attaches directly to the tubing of the seat bar Includes: Two Stern Side Rails, Universal Seat Mount, Cross Bar and High-Back Swivel Seat Seat bars now use the Universal Seat Mount for attaching the padded seats. Create your rower's seat bar for the High-Back Drain-Hole Seat by U-bolting the Universal Seat Mount to the short cross bar The heart of the NRS frame system, the LoPro Fitting allows complete adjustability for all frame parts. Now made in stronger, lighter hot-forged aluminum alloy. Important Note when ordering: In 2014 we've changed the design of the LoPro Frame Fitting. Which Anchor System you need depends on whether you have the older or newer design. If you have new hot-forged LoPros, this is the system you should order. If you have the older cast LoPros, order Item # 93081.01.