Genuine OEM Audi Gas Strut, part number 8J7871555. This gas-pressurized strut provides the necessary force to assist in the smooth opening and closing of the convertible roof assembly. It is positioned within the roof linkage mechanism to support the weight of the frame during operation. Genuine OEM gas struts are essential for this application to ensure the correct damping force and pressure rating, which prevents mechanical strain on the roof hinges and ensures consistent, reliable movement.