Features 1、Nice replacement accessory for the old or broken one 2、Made of superior plastic material, which is solid and durable for long term use 3、With strong thrust, the propeller can be used for electric RC underwater O-boat 4、Easy to install and once installed, it is not easy to fall off 5、Compact in size and light in weight Features: Nice replacement accessory for the old or broken one. Made of superior plastic material, which is solid and durable for long term use. With strong thrust, the propeller can be used for electric RC underwater O-boat. Easy to install and once installed, it is not easy to fall off. Compact in size and light in weight. Specification: Condition: 100% Brand New Item Type: RC Accessory Material: Plastic Color: Black Outer Diameter: Approx. 40mm / 1.57inch Inner Diameter: Approx. 4mm / 0.16inch Height: Approx. 17.5mm / 0.69inch Weight: Approx. 4-16g Quantity: 2 Pairs Package list: 2 Pairs of 2-Blade Propellers Package List