Fits the stern of the Sea Lion, Spectrum, and Chinook NW kayaks by Aquaterra and Perception, circa late 1990s. Also fits the Perception Eclipse and Shadow composite hull kayaks (NOT plastic hull). The Eclipse and Shadow are based on the original Sealion and often bear that name (kind of like a middel name). Can be used as a substitution hatch for the stern of the Wilderness Systems composite Sealution XL, circa late 1990s. May fit other kayaks with a similar size and style hatch.
Same dimensions as the Aquaterra - Perception size Medium M neoprene cover originally out fitted on these older kayaks (other versions of the same, or slightly larger neoprene hatch cover might be marked as Large L on older kayaks circa 1980s and early 1990s). If your kayak is very old, or is the original Aquatera Chinook (with a small round hatch on the bow) try the Perception Large Neopren Hatch Cover.
This cover is fits the raised lip of the stern hatch opening, approximately 20 x 15 inches out side dimensions.
This is the inner stretchy fabric cover that goes under the hard plastic strap-down cover. (Both covers must be use together for a watertight seal, outer cover not included.) Cover measures approximately 19 x 14 relaxed. Neoprene hatch covers stretch about 1-2 inches larger than relaxed dimensions listed here. Cover may bear the one of the following names: Sea Lion, Spectrum, Stern, Aquaterra, Perception or Medium. They are ALL the SAME Medium Size. If it matters to you type name of your kayak in comments box at check-out. PERNEO
Kayak Hatch Replacement Options Part III - Double Covers: Neoprene Inner Cover - Outer Hard Covers