Polished Aluminum Air Conditioning Firewall Heater Bulkhead 2 ports Push-on 100% brand new polished aluminum Heater Bulkhead 2 ports push on These bulkheads use 10 AN fittings,with a sleek design and AN fittings. For running your a/c and heater hoses through the firewall while keeping everything looking nice and clean This piece is meant to mount on your firewall to route your AC hoses with style