Bracket that lets you mount a standard 40mm fan to a slot intended for 45mm fans as found in some high current ESC's such as the 8S 550A ESC Brushless-E6Max. Although that ESC states it comes with a 50mm fan, it is in fact a 45mm.
Replace a failing fan that will lead to your expensive ESC cooking or get way better cooling and way more fan options by upgrading to a superior 40mm fan than whatever fan it is that the ESC came with.
Please look at technical drawing for exact dimensions.
Comes only with the bracket. You will need the original bolts that held the original fan to mount the bracket onto the heatsink. You will need 4 M3 bolts of sufficient length for your 40mm fan and 4 M3 nuts.
PRINTED IN HIGH-TEMPERATURE RESISTANT ASA (LIKE ABS).