Personalized Funny Hydraulic Engineer Long Sleeve T-Shirt. Funny Hydraulic Engineer Long Sleeve T-Shirt - Vintage Black say "Flow Rate Beer Hydraulic Engineer" in white text and makes a fun gift design for ale loving engineers! 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