This brain stress ball is a great handout for medical students, doctors, patients and much more. Use this customizable stress ball to squeeze and relax while in class, at the office or while at home. Perfect for tradeshows, seminars, office events, conventions and much more. Made from pu material, measuring 2.25 * 2.75 inches, this custom brain stress ball. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization available: Print your logo or customize packaging and color schemes. Product Highlights: Portable, durable, practical for daily use.