Front water-cooled motor plate for 28mm, 36mm, 40mm & 540 sized motors. Motor hole spacing from 19mm to 25mm The anodized aluminum mounting plate is water-cooled for added insurance against overheating. This can come in handy with both inrunner and outrunner-style brushless motors. It is especially useful in outrunner motors, that do not have water cooling fitted to the motor. Applications: 28mm, 36mm, 40mm motors. Some examples are Leopard, SSS, Tp motors. Specs Width: 53mm Side mounting holes: m3 thread x 4mm deep. Fits most motors that use a 19mm to 25mm mounting hole spacing, as long as the motor mounting screw is not larger than 3mm. Requires you to provide motor mounting screws. Includes: 1 mounting plate. This can be used as either a replacement or if you have your own rails to mount this to.