A very small timing belt for positive drive applications is available. The 55-tooth, 1-mm-pitch drive belt is designed for use in small medical devices. Able to be substituted for O-rings, it offers a nonmarking surface. The belt is reinforced for long-term length stability and can be supplied with the customer’s choice of fiberglass, aramid, or polyester fibers. Belts with curvilinear profiles are efficient design alternatives to gears in the drives of compact medical equipment when a high reduction ratio is required.