Promotional tennis ball in size, material and weight of those used in professional tournaments and associations. Pet-friendly. Non-toxic ink used to imprint this item. Made of Rubber and features 100% Polyester felt exterior. Great for awards and giveaways, or to customize the pieces you use in your local tournament or club. Due the imprint surface, this item has Artwork Requirements to ensure quality. Min. 28 pt. font required in either: Comic Sans Regular or Arial RegularWe are unable to use artwork that does not conform to these requirements.