Shock Seal Head - 12.5 mm ID x 40 mm ODCaracteristicas: Complete assemblies, ready to install into the shock body Made from 6061 T6 aluminum and the same custom elastomer as our fork seals All have air bleed holes to help remove air from the oil reservoir during installation Double lip oil seal designed to keep out dirt and keeps friction low Some models have updated designs for easier installation Includes aluminum body, dust seal, bushing, oil seal, O ring, internal guide bushing washer,