Ensure your motor will not overheat and stay super cool
Other Feature
Apply for RC 540 / 550 motor; Outer diameter: including the fan is 5.1cm,
without the fan is 4.1cm; Inner diameter: 3.4cm; Height: 3cm; Width: 3cm; Cable
length: about 17cm; Weight: 24.3g; Can be used with brushed and brushless motors
Packing List
1 x Motor heatsink
Dimensions: 2.01 in x 1.18 in x 1.18 in (5.1 cm x
3.0 cm x 3.0 cm) Weight: 0.86 oz (24 g)