All Balls Rear Shock Seal Head Kit, 50×18

Complete assemblies, ready to install into the shock body; Made from 6061 T-6 aluminum and the same custom elastomer as All-Balls fork seals; All have air bleed holes to help remove air from the oil reservoir during installation; Double-lip oil seal design keeps out dirt and keeps friction low; Some models have updated designs for easier installation; Kits include aluminum body, dust seal, bushing, oil seal, O-ring, internal guide bushing/washer, snap ring, and top-out bumper; ID: 18mm; OD: 50mm; Snap Ring: 53×1.75 round