For a professional looking installation use Proflow's bulkhead plates. These lower-profile plates allow for easier tightening of your fittings and keep hook-ups tidy. Streamline bulkhead plates are available to fit your application in 2 or 4-way square, 2 or 4 -way inline styles to accommodate your A/C and heater hose fittings. Crafted from aluminium, Proflow plates are available in polished or black anodised finishes.