Dodge synchronous belt drives require no lubrication. They provide a positive engagement between a toothed belt and a toothed sprocket and are offered with curvilinear, modified curvilinear and trapezoidal tooth profiles. Dodge Dyna-Sync Timing Belt, Single Sided, Series: H, 180 Teeth, 1/2 in Pitch, 90 in Overall Length, 1-1/2 in Width, Neoprene, Fiberglass Reinforced Material Tough, tensile cords, no-stretch fiberglassLong wearing nylon duck facingOil, heat and ozone resistant