the fan blade can work well with many kinds of 130 DC motor with 2 mm shaft(tight fit), easy to install and light weight Product Specifications: Color: Red + Blue Material: Plastic The whole diameter: 80 mm/ 3.15" Aperture: 2 mm Package included: 8 Pcs Blue Propellers 8 Pcs Red Propellers Customer service: If you have any problem of our product, you can click"seller contact"button in your amazon account to email us, we will reply as soon as we can
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