Round Belt: The round belt features a circular cross-section made for light-loading machines and smaller tasks requiring continued movement. They are designed to be used with pulleys that have a V-shaped groove. A benefit is that they can easily bought from any round belt supplier to be DIY cut-to-length and merged to suit the pulley system.http://www.sdlandbridge.com/rubber-conveyor-belt/special-shaped-conveyor-belt/