CNC machined 6061 aluminum assembly includes; weld bung, cap and crown. The crown is engraved to industry standard with corresponding icons (power steering fluid, engine oil, coolant reservoir and radiator cap). Designed specifically for custom applications: Weld the bung to your tank, thread on the cap, and use epoxy on the crown to precisely position and lock the icon in your desired orientation.
Available in natural finish. 
Overall diameter 2 ⅜”
Complete Set of 4 or purchase individually. 
100% made in the USA.