Etermal Boat Seat Swivel Base，360 Degree Rotating Flat Heavy Duty Seat Swivel Base 6.3" x 6.3" for Bar Stool, Chair, Boat or Van Pilot Seat;

Main Features：
1.360 Degree rotating boat seat ball bearing attaches to an existing stationary boat chair or floorboard to rotate free with zero tilt.
2. Each boat seat swivel features mount plates on each end of the center bearing measuring 6.3" x 6.3" with 4 mounting holes.
3.Mounting holes (0. 8125"L each) are positioned square from 5" to 5.625" apart.
4.Designed for universal fitting with most single person boat chairs.
5.Boat seat swivel only, Mounting screws is not included.
6.Heavy duty steel with durable paint finish.

Package Included: 1 x Boat Seat Swivel(Mounting screws is not included)