polyurethane foam;Classic promotional giveaway ideal for sport-theme events, school and-team spirit giveaways and healthy-living events; Our handcrafted stress relievers are a fun way to promote your company, organization, hospital or school, while also helping everyone who receives one squeeze away the stress of everyday life!; Note: Due to their handcrafted nature, stress ball sizes, colors and textures may vary, Factory cannot guarantee consistent imprints or PMS matches ; Not intended as a child’s or pet’s toy; Product Size: 2.5″ dia.;