Swamp Cooler Motor huge & low use A.O. Smith RPM 1 2 speed S # C56A72B29 & HZ60 & AMB 40c & NO. 24401B. Measurements the rubber mount to the other rubber mount is just a hair under 91/2" inches, the motor length is 81/4" inches, length from end of motor to the adjustable belt pully is 101/2"inches, width of motor is 61/2"inches. The expense of these motors brand-new is around 275.00. Its yours for 80.00.,,,, O.B.O.,,,, two3.