Most FSB products are 'implements' for the opening and closing of doors and windows.

Sooner or later, depending on what they are made of and where they are fitted, they will inevitably begin to show signs of wear. The properties of this material can be summarized as follows:

Much has already been said in the FSB manual regarding the properties of brass. Whereas aluminium is more or less a pure metal, brass is an alloy with tendencies towards corrosion.

We would therefore like to emphasize once again here that only regularly cleaned brass components without lacquer retain their initial allure.

Once the coating of the lacquered version has been breached, unsightly corrosion sets in, and this can only be reversed in our factory after a laborious stripping operation.

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