What is n1 and n2?

Without context, it is difficult to provide specific information about n1 and n2. It is possible that n1 and n2 are variables or placeholders in a mathematical equation, in which case they could represent any numbers or values. Alternatively, n1 and n2 could be references to different objects, individuals, or concepts in a given context. More information is needed to provide a more accurate description of n1 and n2.