AutoTex W1-13 W1 Traditional Winter Windshield Wiper Blade - 13" (Pack of 1) Universal connector is pre-installed to fit 9x3 and 9x4 hook, 1/4" and 3/16" pin, and bayonet wiper arms All-steel frame is covered by a rubber boot to prevent snow and ice build-up Engineered for extreme winter conditions DuraTex advanced rubber compound is compression-molded, 100% natural rubber