catamaran boat: 1)double-side PVC coating 2)Floor:Aluminum or plywood 3)Transom: Stainless steel 4)warranty 3-5 years Qboat owns characteristics of most favorable price,light-weight,high-performance ,most safety and stable .it is widely used to sea,river, and lake.it can be regarded as luxury yacht for enjoying ,rescue boat for government,fishing boat for individual,raft boat for exciting group, ...