New Rawlings Eclipse Fastpitch Softball Bat Size:30 18 All Alloy Design ' Patented Pro One Size:Leather All Alloy Design ' Patented Pro Cup End Cap ' ST+20 Alloy while increasing the area for TPU Cushioning in those high impact areas and improving impact absorption Medium: Head Size 6 1 2 7 you'll be squaring up and delivering hard contact on anything in the zone IMPROVED CONTROL AND VIBRATION REDUCTION created from the Eclipse's high tack grip and concave endcap DURABLE LIGHTWEIGHT ALLOY DESIGN Delivers consistent performace all season long HIGH TACK GRIP AND CONCAVE ENDCAP Improve barrel control and reduce vibration in the handle CERTIFICATION ASA USSSA NSA ISF ISA X TENDED SWEET SPOT Thanks to the X tended sweet spot design