A/C & Heater Firewall Bulkhead & Fitting Kit Billet Aluminum. They are nicely made of billet aluminum in silver color, bulkhead in square shape. Kit includes 1x bulkhead w/ 1x 5/8”-18 (-6) port & 3x 7/8”-14 (-10) ports, as well as compatible fittings (1x 5/8”-18 & 3x 7/8”-14).
