1、The rudder is made of anti-rust and anti-corrosion 6061 hard aluminum alloy, it has high strength and durability. 2、The rudder plate of 75mm/3in is suitable for electric boat or methanol boat within 60cm/23.6in. 3、The rudder plate of 95mm/3.7in is suitable for electric boat or methanol boat within 85cm/33.5in. 4、It is made of all CNC machine process to guarantee the best fit. 5、It is mainly used in electric boat, methanol boat steering and motor water cooling design. Features: 1. The rudder is made of anti-rust and anti-corrosion 6061 hard aluminum alloy, it has high strength and durability. 2. The rudder plate of 75mm/3in is suitable for electric boat or methanol boat within 60cm/23.6in. 3. The rudder plate of 95mm/3.7in is suitable for electric boat or methanol boat within 85cm/33.5in. 4. It is made of all CNC machine process to guarantee the best fit. 5. It is mainly used in electric boat, methanol boat steering and motor water cooling design. Specification: Condition: 100% Brand New Item Type: RC Accessory Material: 6061 Hard Aluminum Alloy Optional Color: Silver, Blue Optional Depth of Rudder Plate: Approx. 75mm/3in, 95mm/3.7in Package List: 1 * RC Rudder Note: Please allow slight deviation of 1-3mm for manual measurement. Thanks for your understanding.