techniques for example purposes only a composite handle 18 may be made by rolling at least one flat sheet of pre preg around a mandrel thereby making a tube with an outer diameter appropriately sized for a ball bat handle in a preferred embodiment the sheet of pre preg comprises two layers of graphite pre preg with fibers angled u2212 15 degrees from the longitudinal with one layer orientated at a negative angle to the other layer two layers of pre preg with a height of about 0 005 inches 0 127 mm and fibers angled 90 degrees from the longitudinal are wrapped around the last 7 87 inches 20 0 cm of the handle 18 at the end opposite the knob 22 the barrel 14 is a mostly constant diameter hollow tube that tapers through a transition region 16 to the handle 18 in one embodiment the barrel 14 is made of composite material the composite barrel 14 may be manufactured using common manufacturing techniques for example purposes only a composite barrel 14 may be manufactured by spirally rolling 24 layers of high aspect ratio parallelogram shaped pieces of pre preg each layer having a height of about 0 005 inches 0 127 mm on a rolling mandrel with the fibers oriented longitudinally thereby making a tube with an outer diameter appropriately sized for a ball bat barrel the parallelograms are rolled up such that.