High Precision: M8 aluminum spacers (8.2mm ID x 16mm OD x 20mm L) provide accurate alignment and spacing. Durable Material: Made from high-strength anodized aluminum for corrosion resistance and long service life. Wide Application: Suitable for valves, cylinder heads, automobiles, steel plants, chemical equipment, and construction machinery. Perfect Fit: Designed for M8 screws, ensuring secure installation and stable structural support. Pack: Includes 4pcs black aluminum spacers, ideal for repairs, maintenance, or custom assemblies., Manufacturer: AS Axis Spindleon