For people who are only concerned about achieving the maximum-possible attenuation, the Wipe Module would be of articular interest. The module is designed to use commonly-available (and, more importantly, very cheap) rubber washers as wipes. The Wipe Module has been designed in four lengths, with each next length supporting an additional wipe (e.g. the 1.50" module will only fit one baffle, the 2.00" will fit two, etc). Unlike other modules, the Wipe Module requires a minimum of two printed components - The Wipe Host, and the Wipe Insert. You will need to print one Wipe Insert for each wipe you plan on using.