Ladder-back chair features 28-oz. marine-grade vinyl that is loaded with UV and mildew inhibitors. Rotational molded seat frame. Padded armrests. High-compression foam padding. Included pedestal will adjust from 12" to 18". Spider mounting plate. Three-year warranty on upholstery. Six-year warranty on frame. 19"H x 22"W x 22"D; 17"W (inside). High-compression foam padding | Wise Ladder-Back Chair With Adjustable Pedestal, Spider Mounting Plate