polyurethane foam;These fun building block stress balls are a great way to promote team unity and skill building in the workplace ; 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 releiver sizes, colors and textures may vary, Factory cannot guarantee consistent imprints or PMS matches ; Not intended as a child’s or pet’s toy; Sold individually; Product Size: 3.125″ w x 1″ h x 1.5″ d;