Material: plastic Size: 51mm/57mm Color: red, blue, black, white 100% brand new and high quality Name: Propeller Spinner Propeller cover for electric/oil-powered plastic propeller primarily refers to the size of the aircraft cover and the propeller cover's fixed disc, rather than paying too much attention to the matching between the propeller cover and the propeller. Subsequently, we provide the maximum size of the propeller suitable for each propeller cover (using GEMFAN APC saber propeller as a reference). Because the size of each manufacturer's propeller is different, the height and diameter of the motor's propeller clamp or the thickness or length of the motor shaft should also be considered. Currently, all covers can only be matched with positive paddles; due to the different shapes of the paddles, the length and size of the matching can only be a rough reference. The rigorous point is to take out the physical paddles and covers; practical installation can be successful! Please choose according to your own needs; if the purchase is wrong, bear the consequences yourself. Package includes: 1 x Propeller Spinner