This particulate filter is compatible with the 3M versaflo powered air turbo TR-600 series. Easy to install as it attaches directly to the turbo. 3M recommends the use of the TR-6700FC filter cover to protect the filter from physical damage. This filter is also used to hold the TR-6600 prefilter or TR-662 spark arrestor in place. Suitable for providing respiratory protection from particles in most workplace situations such as manufacturing, pharmaceuticals and food processing.