Swivl-Eze Lock&';N-Pin 3/4" Pin Seat Mount - Zinc CoatedSpecifications: Zinc-plated Tilt: 3 degrees Pin (inch): 2-3/4" Steel Pin with Spring ABYC Code: B (not to be used at the helm/driver position) Installed Height (inch): 2" #1 supplier of 3/4" pin seating hardware. Here&';s why: The 3/4" system gives you outstanding economical performance The design is proven by decades of experience The Difference: The patented Lock&';N-Pin system leads the industry in safety Lock&';N-Pin prevents unintentional detachment for seat mounts, posts, and bases Lock&';N-Pin products exceed ABYC Standard H31.6.1 Not recommended to interchange with other manufacturers&'; products Quick Guide (pdf)