Ideal for hands-on learning and creative exploration, these four-leaf fan are Suit for science experiments and DIY crafts. Their versatile design supports a wide range of uses, from powering model boats to enhancing RC projects. The Sturdy plastic construction makes functionality and ease of DIY. Features -Color:Blue -Material:Plastic -Size:5.60X5.60X1.10cm/2.20X2.20X0.43in -Design: 1.5 mm hole diameter makes secure attachment and smooth rotation, enhancing the functionality of your model -Improved performance: four-leaf 60 mm design boosts air , making it ideal for small flying devices and diy projects - : handfinished edges reduce resistance, enabling longer and more quick use in various applications -Lightweight advantage: ultralight materials reduce strain on motors, improving responsiveness and extending battery life -Wide application: suitable for rc planes, model boats, and science experiments, making versatility for hobbyists Package list: 40 x Miniature Fan