4043 Welding Wire, Aluminum, 3/64" DiameterSpool Cleanliness, density and temper of wires are precisely controlled Each container has an identification label showing grade, size, weight and heat number Conform to AWS A5. 10 classification, CWB and ABS approvals; 5% silicon all position aluminum weld wire used to weld heat treatable alloys such as the 6XXX base metals and cast alloys Found in many common welding applications such as bicycles, trucks, trailers and automotive parts and equipment