Arm guard for hitters (elbow guard); Manufacturer name: Mizuno (MIZUNO); Color (manufacturer part number): White (1DJPG10001), Black (1DJPG10009), Navy (1DJPG10014); Size: One size fits most; Weight: Approx. 8.5 oz (240 g); Outer material: Polyester; Compatible with high school baseballs.