Louisville Slugger MLB Prime Ash I13 Unfinished Flame Wood Baseball Bat (32 inch) : Louisville Slugger MLB Prime Ash. Stronger. Harder. Farther. MLB Prime gives you the chance to swing the EXACT same bat as the big leaguers. MLB Prime is built with the best quality Veneer wood, Amish craftsmanship, our exclusive 360 degree compression to increase hardness, our advanced finish system and is now bone-rubbed for a visible hardness. Ash gives you strong timber, and lighter weight. Pound for pound, Ash is the strongest timber available. Ash tends to flex, giving the hitter a more flexible sweet spot. Ash is available in the widest range of turning models.