Over the 35 years we have been manufacturing filters we have produced many types of filter modules.

Passive filters
We no longer support or make passive filters.

Fixed frequency filter modules - some of these types can still be manufactured as spares if required. OR we can usually supply a more modern replacement with the same filter characteristics.
1100 Series - we can manufacture most of these. 
1300 Series - obsolete, replaced by 1200 series.

Please contact us with as much information as you have about the filter modules you require or wish to replace.