Home / RC Car Parts / Electric Motors Product Description Heat sink with Fan for 540 size (36mm) Motors HSP 03303B Add extra cooling to your 540/550, 3640,3650 size motor. Fits motors with a 36mm body diameter.Extra air vents allow the airflow directly to the motor case. Fan is 5V and can connect to either the ESC if it has a 5V output or use the spare BATT connection on the Receiver. HSP Part number: 03303 Blue Internal Dia.: 36mm Fan: 5V DC brushless motor. Fan size: 25x25x10mm Specifications Scale 1/10 Brand HSP Product Code 03303-B Weight 0.11kg Delivery HSP Heat sink with Fan for 540 size (36mm) Motors 03303B Item in Stock Product Code 03303-B RRP: £9.45 £7.99