This carpeted bunk is designed to support the bow of a jon boat or other flat bottom boat. This support bunk adjusts from 5.5" to 8" above the tongue. Brackets are hot-dipped galvanized. Support Bunk comes complete with mounting hardware for 2"W or 3"W tongues. Smith Support Bunk is carpeted with high-quality marine-grade, weather-resistant carpet to protect your boat's hull from scratches. Measures 2" x 4" x 24".