A pleated and flexible protective device used over bare metal that collapses and expands with travel. Coil Spring Insulator. Includes: Dust Shield. Coil Spring Insulator. Dust cover. Dust seal. INSULATOR, FRONT COIL S. Protect tube. SHIELD. Shock cover. Spring seat. Strut mount retainer. Suspension Strut Bellows. Upper insulator. Upper seat. UPPER SPRING INSULATOR.