Ground OK on the schoolyard or just easy to carry 10 mm thickness tough chip resistant. How to use whether youre a Peace of mind in domestic. Baseball Boy Baseball (evacuation in) Size Home Base (oblique) Size 381 mm × 190 mm × 269 mm × 10 mm (Boy (evacuation in) Size (W x H x D) ■ Weight approximately 1.8kg bases base size 356 mm × 356 mm × 10 mm (Boy Baseball (evacuation in) Size (W x H x D) Weight approx. 2.4kg Material: Natural rubber + synthetic rubber Country of origin Made in Japan