This is a replacement for the small teak tread used on Whitecap's swim platform with single step ladder (#60902) for boats with outboard motors. Teak wood construction will resist rotting, warping, and weather elements, making it ideal for marine applications. 6"W x 2"D x 1" thick. Remains durable in marine environment Teak resists rotting & warping | Whitecap Replacement Teak Step Tread