Benefits:E-flute is ideal for high quality printing with a thickness of 1/16ʺ.It is generally used for mailers and some specialty displays like the shoe box,souvenir items, beer & wine cases, decorative item cases, food item display, car battery and special clothing item packaging.F-flute is half as thick as E-flute making it our lightest packaging option.Since this has the largest number of flutes per foot, it also allows for the most accurate folding operations. You’ll see F-flute offered in our smallest sizes.