This is a O.S. Engines Bubbleless Fuel Pick-Up (clunk) Weight for Airplane and Helicopter Fuel Tanks. The weight attaches to fuel tubing and is put into an aircraft's fuel tank. This Bubbleless Clunk is plated throughout to prevent corrosion and its mesh design prevents bubbles from entering the fuel line and causing damage to the engine. The silicone-rubber O-ring prevents internal damage to fuel tank by acting as a bumper and the fuel line connection barb and weight are positively joined together to eliminate the possibility of separation.