I have one trailer axle with electric brakes in great condition. It measures 79" between backing plates. 69" to center of spring mount. This came from my 32" camper. I had a wheel bearing fail on the other axle and ruin the spindle. I replaced both axles with new heavy duty units so these are for sale. The ruined axle is included for parts. It has one good hub. This would be great for someone building a trailer. They are 4400 # axles. They have the standard 6 bolt pattern. They were new in 2011. Send message if you have questions. Thanks