ACDelco 8-992115 Professional Beam Wiper Blade with Spoiler, 21 in (Pack of 1) Direct-fit connector allows for quick and easy installation without the need for a universal adapter Variable-sized coupler provides optimal load distribution across the length of the blade Composed of a natural and synthetic blended rubber compound that enhances wiping performance and durability Specialized MGT (anti-friction) coating on the wiper elements helps reduce friction, lengthen the life of the windshield wiper blades, and provide great performance Aerodynamic GM OE-style spoiler helps reduce wind lift