Best used as replacement seat knobs for some Perception kayaks such as late model Crank pedal kayaks. Can also be used for the LL Bean Manatee II, the Perception Cove 145 (before 2020), the West Marine Albatross and will also fit the LL Bean Manatee 145 (before 2020) all tandem kayaks. Black knob with colorful thread cover. Screw is 1.25 inches long. Knob is 1.75 inches across. 1/4-20 Threads. OUTKNOB

FYI: The plastic seat adjustment latch for the older Wilderness Systems Pamlico Tandem kayak, circa 2005, and other similar kayaks by Confluence is no longer available.