Marine/Boat Nylon Propeller Material: MC Nylon Type: Diameter 220mm to 1070mm, 2/3/4 blades which can be customized according to customer requirements. Heat-treatment: 40hours, save oil: 15%-20% High Strength and Resist Rust, Long Time use years. Good Performance and High Quality. Self-owned Propeller Factory Provides the Most Reasonable Price in China Mainland. An Ideal Replacement of Bronze Propellers. Widely used on Yacht & Fishing Boat and some Marine Ships. For more details, please contact with me.