This is the Ultra High RPM Fan from Muchmore Racing for Motor and ESC. Used to cool your motor and speed control. FEATURES: Ultra High RPM Micro Black 2-pin Connector YOU WILL RECEIVE: (1) 30x30mm Ultra High RPM Fan REQUIREMENTS: Installation SPECIFICATIONS: Length: 1.211" (30mm) Width: 1.211" (30mm) Thickness: 0.29 (7.51mm) EEW 5/14/08 ir/jxs &