... . Material: as requested 2, Size: as requested. 3. Marine class certificate. 4.azimuth thruster,contra-rotating thrusters Product Specification/ ... kinds of boats.The material can be : Cu1.Cu3,Copper,bronze.The dimension can be according to your requirements.Kindly let ... ,Speed boat,etc.Other Information:We design and supply all marine equipments for container ships,cargo ships,tankers,bug boats,trawlers ...