1: cap and backparts in brass G8 - gold gleams finish.
2: cap and backparts in brass BM - eco black mat finish.
3: cap and backparts in brass A7 - eco black metal finish.
4: cap and backparts in brass E2 - eco nickel free finish.
5*: invisible washer and backparts in brass G8 gold gleams finish - BM eco black mat finish - A7 - eco black metal / finish E2 - eco nickel free finish.