Gravity conveyors rely on gravity for moving the products from one place to another. Rollers mounted on the conveyor spin allowing the objects to slide when pushed. Being one of the simplest conveyor types, gravity conveyors are a great starting point for improving processing plant efficiency. Modular conveyors are more sophisticated conveyors systems. Combining modules with different conveyors allows a virtually three dimensional movement. Their moving surface is great for products of different shapes and textures. Liquids can drip through the porous surface of the chain. Conveyor belts move objects from one end to another using a belt mounted on top of closely spaced rollers or a solid plate. Varied speed settings make it one of the most common conveyor types.