Quick view Tuf-Tite 4" Speed Levelers (100 Pack) Compare $159.00 To equalize effluent flow from a distribution box. Engineered to fit commonly used Schedule 40, SDR 35 (3034), and 2729 pipes. Tuf-Tite Speed Levelers Brochure Tuf-Tite 4" Speed Leveler Drawing SL-4 Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List