Look no further. Outstanding product quality， that's solidly built. Best of all， its very affordable price. Buy now. <br />Unit size: 37 x 7 mm<br />Suitable for V977 /v930 RC helicopter  <br />2 x Tail Rotor<br /><img src="http://img6.eachbuyer.com/x21/p61/bj590_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x21/p61/bj590_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x21/p61/bj590_3.jpg" />