StrongArm 4762 Buick Roadmaster 4 Door Wagon Glass Lift Support 1991-95, Pack of 1 Exact fit, OE quality design ensures easy installation and precise operation No special installation tools required Rubber O-Ring piston seal forces the fluid efficiently through the valving components providing consistent performance Patented Multi-Lobe Seal makes gas springs more tolerant to vibration and temperature extremes Individually tested for performance and reliability