Cable grommets are offered for popular cable diameters of 1/8", 3/16" and 1/4". They help prevent rust inexterior applications or elsewhere where moisture is a factor, by providing a barrier between the cable and the painted or powder-coated surface through which the cable is drawn when being installed. Ultra-tec cable grommets are installed (after the paint or powder coating is applied) into holes in intermediate posts, cable braces and, in the case of the Inisiware Radius Ferrule, Push-Lock, and Pull-Lock fittings into the end post holes through which the cable exits. They are offered in black UV resistant Delrin®.