The description on the S&M site sums this one up..." The Challenger stem is back friends... & yes, it's exactly the same as the original. So obviously, this hunk of awesome is much too heavy for you new-school-weight-whores at 12.8 oz. Any heavier & you might get too buff from the work out & be unable to fit in your sister's jeans...bummer, I know" Made in the USA from 6061 aluminium section Product Specs TYPE: Top Load REACH: 49mm RISE: 24mm CLAMPING DIAMETER: 22.2mm WEIGHT: 362g