Adjustable Pole Lights Locking Fuel Fills The Delta Series: Adjustable Pole Lights from PERKO offers a big 40° (+-20°) tilt range. Fits most custom bent (fore & aft) pole light applications. Say "NO" to fuel theft! Keep your gas in your boat. Available for vented and non-vented fills. Underwater Lighting PERKO proudly introduces our new underwater lighting system. Increase boatside visibility at night and create atmosphere. Marinium Marinium is Lightweight, Corrosion Resistant, High Strength/Weight Ratio and much more...