polyurethane foam;Our Lightning Bolt stress reliever is a great tool for promoting electric companies and home supply stores; 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; Product Size: 5.75″ w x 1.88″ h x 0.75″ d;