Features:_x000D_ Nice replacement accessory for the old or broken one._x000D_ Made of superior plastic material, which is solid and durable for long term use._x000D_ With strong thrust, the propeller can be used for electric RC underwater O-boat._x000D_ Easy to install and once installed, it is not easy to fall off._x000D_ Compact in size and light in weight._x000D_ _x000D_ Specification:_x000D_ Condition: Brand New_x000D_ Item Type: RC Accessory_x000D_ Material: Plastic_x000D_ Color: Black_x000D_ Outer Diameter: Approx. 40mm / 1.57inch_x000D_ Inner Diameter: Approx. 4mm / 0.16inch_x000D_ Height: Approx. 17.5mm / 0.69inch_x000D_ Weight: Approx. 4-16g_x000D_ Quantity: 2 Pairs_x000D_ _x000D_ Package list:_x000D_ 2 Pairs of 2-Blade Propellers 1Nice replacement accessory for the old or broken one 2Made of superior plastic material, which is solid and durable for long term use 3With strong thrust, the propeller can be used for electric RC underwater O-boat 4Easy to install and once installed, it is not easy to fall off 5Compact in size and light in weight