Modular Belt Conveyor are one of the most economical material handling solutions. Loads are conveyed on rollers or skatewheels which are mounted in frames. Typically gravity conveyors are sloped in elevation to allow products to flow freely, taking advantage of the Earth’s gravity.Gravity conveyors may be used to move boxes, cartons and totes with firm, rigid bottoms. Roller or skatewheel sizes as well as spacing will vary. A good rule of thumb is that a minimum of three rollers must be under the box, carton or tote at all times.