Wise 8WD1500 Aluminum Adjustable Bell Pedestal The Wise Aluminum Adjustable Bell Pedestal can adjust from 13 to 18 and features a locking handle. This pedestal comes with a seat spider mount. The Wise 8WD1500 Pedestal is Class B certified per ABYC standards. 10 Diameter Powder Coated Base Polished anodized aluminum post Standard 5-14 hole pattern 360 rotation with locking knob Wise Hardware features a 3 year warranty. Wise Seats has been a long-standing supplier of replacement and OEM boat seats