Hockey Dimple Ball,Field Hockey

Dimples hockey specifications:
A. is hard sphere ball, the ball inside the hollow, about 1 cm wall thickness, material with PVC or unlimited;
B. weight: 160 g + - 2;
C. the perimeter: minimum 224 mm, maximum 235 mm;
D. : smooth surface, no seams have dents, concave hole about 265, distance of about 0, 5 CM.
E. Color: white.
F. diameter: 7.1 CM