Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: DeMarini Vexxum -5 Baseball Bat with 2 5/8-Inch Barrel
Product feature: SC4 Alloy Barrel DeMarinis proprietary aluminum extrusion provides a thickness tuned wall that reaches down the entire length of the barrel to create a wicked sweet spot that can stand up to each crushing blow., Long Barrel Design Get big. The Long Barrel design Maximizes the bats hitting surface by expanding the barrels area of contact to have the biggest allowable diameter., C6 Composite Handle Designed with a wider weave that optimizes swing flex, this handle works as a powerful one, two punch with Vexxums SC4 Barrel., Half+Half Construction This two-piece hitting system was introduced by DeMarini to create a large, more responsive sweet spot by silencing vibration, flexing before impact and re-coiling with a burst of ball launching energy, For adult leagues and players looking to transition to -3's
Product brand: DeMarini
Target attributes: Weight
Answer: attribute: weight
value: None
source: None