Flexible inclines are designed to simplify adding changes in elevation along straight or curved tracks. The pre-cut foam sections are molded in 2, 3 or 4 percent grades, which takes the guesswork and complex math out of building different levels of track. The 2% Sections (#785-1410) raise the track 4′ in 16′. The 3% Sections (#785-1415) elevate tracks 4-1/2′ in 12′. Four Percent sections elevate trackage 4′ in 8′. All sections measure 2-1/2′ wide x 24′ long.