Check the listing for details. Diamond Bat Bag. Color: Black, Condition: Pre-owned. Listed at 40.00 USD. The Diamond Bat Bag is a small black canvas backpack with a zip closure, designed for baseball and softball players. Made of durable fabric material, this unisex adults' bag features the Diamond brand logo and is suitable for carrying equipment and accessories. Easy to clean with a damp cloth, this stylish and practical backpack is a must-have for any team sport enthusiast. Used very little. Like new. No tears and all zippers work.The Diamond Bat Bag is a small black canvas backpack with a zip closure, designed for baseball and softball players. Made of durable fabric material, this unisex adults' bag features the Diamond brand logo and is suitable for carrying equipment and accessories. Easy to clean with a damp cloth, this stylish and practical backpack is a must-have for any team sport enthusiast. Used very little. Like new. No tears and all zippers work.