Rawlings Plasma Gold -5 Senior League Baseball Bat. New formula for even greater Pure Energy Transfer! The Plasma Gold baseball bats now have 15% more liquidmetal. The Plasma Gold bats also feature Advanced Metallics, which is the ultra proven CRe (Chromium Enhanced) alloy that offers the latest in strength and durability. From the Alcoa Advanced Metallics laboratories, this one-piece frame provides a handle flex that is 1.5 times stiffer than most multi-piece bats.