The XTRM 2212/06 is a 2200 KV Brushless Outrunner with a current capacity of 28 amps @ 60 seconds. A maximum efficiency of 75%, a no load current @ 10vdc of 1.4 amps and an internal resistance of 45 Mohms. This outrunner has a 3.17mm shaft and is designed to run on 2-3 LiPo cells. The motor weighs 47 grams (1.6 oz.) and dimensions are 27.5 x 30mm. A powerful high RPM motor for high speed airplanes or Park Jets. Great for small park jets. Can also be used on helicopters up to 25 ounces with 3 LiPo cells. Includes radial mount, 3.17mm Collet type prop adapter and 2mm Gold Plated Bullet Connectors.