This is the Castle Creations "CC Blower" Fan Shroud, intended for use with Neu-Castle 15 series motors, as well as motors that have outside diameters between 1 1/2" and 1 7/8". Pushing your Mamba Monster to the max? Just the type who likes the motor as cool as possible? No matter which category you fall under, Castle has the solution! The new CC Blower plugs directly into your receiver for power, and can drop motor temperatures as much as 30 degrees!* A must have for any hardcore basher or temperature freak, get yours today! Your Mamba Monster will love you for it! *NOTE: This product is for supplemental cooling purposes only, and should not be used to push the motor beyond its recommended limits or cover up heating issues caused by your setup. If you have any question on how to lower your motor temperature please contact Castle Creations tech support at support@castlecreations.com. Temperature drop will vary depending on setup. Castle Creations, Inc. warrants this product to be free from manufacturing defects for a period of one year from date of purchase. Includes: Fan, Shroud, and two (2) black zip ties.