The description on the S&M site sums this one up...\"The Challenger stem is back friends... and 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 and you might get too buff from the work out and 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