Description: 【Universal Fit】: Designed to perfectly fit a 7" x 7" (17.78cmx17.78cm) boat seat base, the bracket is easy to install and features a universal hole pattern that accommodates most seats 【Wide Application】: Mount boat seat pedestal is suitable for speedboats, yachts, pontoon boats, fishing boats, bass boats, cargo ships, and RVs, it is a versatile choice for a variety of marine and recreational vehicles 【Premium Shock Absorption】: Equipped with quality shock absorbing spring,boat seat mount base effectively disperses through scientific structural design to ensure that your seat remains stable even in harsh conditions 【Sturdy Structure】: Cabin seat installation base made of iron, the surface is painted with high temperature paint and galvanized, which is moistureproof and prolongs the service life of the product 【360° Rotation Function】: Providing 360 degree rotation, marine pedestal base enhances flexibility and adaptability in different scenarios, allowing you to get the best seat comfort the water or water sports Specification: Material: Iron   Size Chart: 17.5cmx17.5cmx14.8cm/6.89inchx6.89inchx5.83inch Package Includes: 1 Boat Seat Base Note: Please allow slightly errors 1-2cm differences due to manual measurement.