RC Boat Nylon Steering Rudder"RC Boat Nylon Steering Rudder Submerged Rudder for 50cm-160cm RC Boat Marine Tug Fishing Boat Model -- Description -- This Rudder pad is made of glass fiber extension nylon, used for RC boat,RC scale marine, RC fishing boat, RC tug boat... There are two copper bearing bush be fixed on the end of the sleeve to ensure that the rudder work smoothly and stablly. The rudder shaft and sleeve are made of 304 stainless steel,support to use in sea water. Servo arm is made of 6061 Aluminum alloy, made by CNC, Anodize finished, it is strong and durable. There are four sizes available: Size A: Rudder pad size: 52mm*32mm*49mm, Fit 50-90cm long boats. Size B: Rudder pad size: 62mm*37mm*58mm, Fit 90-120cm long boats. Size C: Rudder pad size: 75mm*48mm*70mm, Fit 110-130cm long boats. Size D: Rudder pad size: 90mm*57mm*84mm, Fit 130-160cm long boats. -- Specification & Features -- * Material: stainless steel & Copper & Nylon * Sleeve diameter: 8mm * Shaft diameter: 4mm * Servo Arm total length: 47mm * Linkage End: Fit 1.5-2mm linkages -- Item Contains -- 1 piece of RC Boat Nylon Steering Rudder