The left-wound and right-wound spirals are rods. If the rod pitch is less than two-fold spiral pitch, the belts are called A2. If the rod pitch is equal to or greater than two-fold spiral pitch, the belts are called F2.
● The surface is flat, so that unstable items can be carried.
● The alowable tension is high, so that heavy load can be carried.
● The belts can be used at high temperature.
● The belts can have tight mesh, they can carry small materials.