Aluminum veneer material model meanings: AA represents US Aluminum Association] [Aluminium Association performance standards. 3003 represents aluminum manganese element. The 1100 high purity aluminum material represents 99% H2 representative of the material state. Not annealed state, also said that a state of heat treatment! 4 represents the physical material hardness control technology, in short, belongs not annealed H24 semi-hard state!