Material:aluminum 6061-T6. Max pressure:1000PSI(68.94bar),Operating temperature: - 65℉ to 252℉. Flare aluminum weld on the adapter, weld this onto your fuel cell, oil cooler, catch tank, swirl pot or any other aluminum tank etc. HIGH-QUALITY MATERIAL: The weld bung made of high quality lightweight T6061 Aluminum. Weld bung feature: rustproof and corrosion-resistant, heavy duty and durable. WIDELY USED - weld bung is widely used in Diese, E85, Water, Air,Fuel lines etc. It can be welded on your fuel cell, oil cooler, catch tank, swirl pot or any other aluminum tank Design to stepped for ease of welding and are available in 3AN,4AN,6AN,8AN,10AN,12AN,16AN. Hand polished finish adds the final touch of quality and protection for weld bung. FEATURE - These straight bungs have a wide inlet with a deep taper to enhance flow right out of the tank. Weld bung has 37-degree "AN" sealing angle design assures leak free performance. NOTE - After welding, it needs three hours of natural cooling before use. Professional Installer is Highly Recommended.（weld bung No installation instructions）