The Clayton sold, couldn't figure how to change the title this one is $3500 Chassis Dynamometer with 8" rollers 16" diameter ventilated rotor with ceramic coated steel and a 3" pad area Pads are full metallic pads from a Military Humvee This is a unique Dyno designed & built by Carl Debien of Deb's Automotive Engineering originally out of Springfield MA. & now Delray Beach FL. Sun Machine 450 with 4 gas analyzer and low amp probe Sun Machine currently not working, I'll post an update if it gets repaired! Will help with shipping, as in getting the Dyno out of the ground and ready to pick up, possible help with crating, expense is buyers responsibility Ebay listing for pictures http://www.ebay.com/itm/271650384161?item=271650384161&viewitem=&vxp=mtr