The TR-6300FC is a filter cover for use with the TR-6320N, TR-6350N and TR-6360N cartridges. 3M recommends the use of the filter cover to help protect cartridges from damage. It is used to hold the TR-6600 Prefilter or TR-662 Spark Arrestor in place.
The TR 371+ Filter Cover holds a TR 3700 Series Filter on a TR 300+ series PAPR. It is a replacement for the TR 371 Filter Cover for the TR 300. The window enables users to see the filter label.