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, snap ring and top out bumper Made in the U.S.A.