COLEMAN Lightweight Aluminum Driveshafts are made from 3.00inch O.D. x .125 wall aluminum tubing, custom made to Colemans specifications, the end yokes are CNC machined from billet aluminum. Each shaft is balanced and includes 1310 series u-joints. This driveshaft offers an 8-lb weight savings over standard steel driveshafts and are rebuildable. Measurement is taken from centre of U/J to centre of U/J.