Features: 100% brand new and high quality Well balanced、 well-made and durable to sustain crash Specially designed for mini multicopters Specifications: Material: Plastic Color: Red Inner hole: 5mm Length: 4.0 inch Screw Pitch: 4.5 inch Dimensions: 3.94 in x 2.76 in x 1.97 in (10.0 cm x 7.0 cm x 5.0 cm) Weight: 2.05 oz (58 g)