CE Smith Jon Boat Support Bunk Bracket Assembly 24 The Jon Bunk Bracket Assembly uses bunk mount crossways to support the flat bottom of boat. The assembly is adjustable from 5-12 up tp 8 above tongue. Features All mounting hardware for a 2 or 3 wide tongue Board is untreated Sothern yellow pine covered with high quality, marine grade carpet Heavy-duty bracket is made of galvanized steel Made in USA Sold individually California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.go