Holt Allen's Bullseye Fairlead is made of black/gray Acetal resin and has a stainless steel liner to minimize friction. It has limitless applications, and works great with high-tech lines.
It has a 1/2 in. (13mm) aperture and measures 7/8 in. high x 1 9/16 in. long x 5/8 in. wide (22mm x 39mm x 16mm).