SPRING SEAT W/INSULATOR; RX350. SPRING SEAT W/INSULATOR; RX350L. SPRING SEAT W/INSULATOR; RX450h. SPRING SEAT W/INSULATOR; RX450hL. A pleated and flexible protective device used over bare metal that collapses and expands with travel. Dust cover. Dust seal. Protect tube. SEAT SUB - ASSEMBLY, FRONT SP. SHIELD. Shock cover. Spring seat. Suspension Shock Absorber Bellows. Suspension Strut Bellows. Upper insulator. UPPER SPRING INSULATOR.