This is one of the best wood shafts on the market! The Ultra shaft has all the benefits; more power, increased smoothness, unprecedented radial consistency, improved chalk resistance, and superior durability. The shaft is constructed from 140 pieces of rotary cut veneer. The veneer is laminated and radially spliced giving the shaft superior quality and playability. The Jacoby Ultra Pro Shafts are available in 12.75mm(+0.2mm -0.1mm) and the Ultra Super Pro in 11.75mm(+0.2mm -0.1mm). Other sizes can be specially ordered with a standard upcharge fee.