About Product:This is a made of high quality PP plastic plastic blades, the blade rotation diameter: 90 mm, the diameter of the central axis: 2.5 mm, the height of the blades: 27 mm, there are four blades, it is black, if the quantity is more, can also according to the customer to specify the color of the production, the blades in the experiment, the teaching of use is very wide also, since 1000, welcome merchants in need to purchase, price concessions, fast delivery, product model; SD2013-64.