Features: 100% brand new and high quality Very strong and light weight. High hardness and elastic deformation is very small、 which can increase the flexibility of the aircraft、 stable connection、 easy to install、 good for each blade. Specifications: Color: Black Length: 4.0 inch Screw Pitch: 4.5 inch Material: Plastic Dimensions: 3.94 in x 3.94 in x 0.71 in (10.0 cm x 10.0 cm x 1.8 cm) Weight: 0.88 oz (25 g)