Subminiature 9g servo. These have plenty of power for hinged point turnouts and smaller rail (code 55 and smaller) solid point turnouts - when used with the servo mounting kit then it can handle higher loads, up to code 100 non-hinged rail. If the point rails are hinged then the rail size is not an issue - it has been used up to G scale. Our servo brackets (see below) are custom made to fit these servos. Size 1.25" wide (including mounting tabs) x 0.5" deep x 1.125" tall. Servo lead about 7". The label on the servo and the lead colors may vary between batches. Works with all of our boards.