Model No:HT-166-27 Size :6.5" Total height:43.5 Effective height:32 Out diameter:167 Dia for mounting:155-4-5 Die of Rivet hole:55-4-4.5 Secondary outer diameter:141.5 Secondary outer diameter:141.5 Dia of paper cone:155.5 We can provide a variety of aluminium frame,we also can supply the products according to customers' needs.