Dust seal. Front. Left. Right. A component (mounted in the center of the spring) which cushions the spring as it is compressed. A pleated and flexible protective device used over bare metal that collapses and expands with travel. Includes Strut Dust Shield. seal. Boot. Coil Spring Damper. Cup. Duct cover. Engine cradle. Jounce. Stop. Strut Shield. Suspension Strut Bellows.