Personalized Nuclear Engineer Atom Long Sleeve T-Shirt. Nuclear Engineer text in red surrounded by orbiting electrons is a fun gift design for engineers at birthdays, holidays and graduation. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL