Holt Allen's Bow Eye is made of gray-black Acetal resin and can be used a sheet fairleads for jibs and other foresails or as bow eyes or fittings. The HA134 has an aperture of 1/2 in. (13mm), and measures 3 1/2 in. x 7/8 in. x 1 1/4 in. (89mm x 22mm x 32mm). It has 2 in. (51mm) hole spacing.