Another important factor is the size and weight of the product. Rollers are great at handling heavy packages, however, they won’t do a good job with small or super light objects that can fall between or off the rollers. In this case, it is better to use belt conveyors. They have rubber surface which can be ribbed to provide a better grip on incline or decline. When it comes to choosing the right conveyor rollers diameter, take the size of your product into consideration. There should always be at least three rollers per one item to make sure it has a smooth ride without any wobbling or gaps.