DeMarini CF5 Fastpitch Softball Bat ( -8) Tri Strut TR3 Composite Barrel  Tri Strut TR3 Composite provides strength, stability and consistent performance through triangular formations at the molecular level. TR3 creates a very strong and responsive barrel without any unnecessary weight. Stacked Barrel Construction  Four independent walls create a dynamic springboard hitting surface giving you sweet spot with ball-popping trampoline effect. Tri Strut TR3 Handle Its the tightest/strongest composite DeMarini have developed. Gaining strength through triangular formations at the molecular level it efficiently transitions power from your hands to the barrel giving you balance and consistency. Clutch 2 Endcap  The dual density cap is designed to maintain the stiffness of the barrel while dampening impact vibration to give you amazing feel, hit after hit. The CF5 -8 is for professional, college players & 18U