60% Efficient Filter

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Medium 60% efficient (white) filter. A good choice for the second stage, especially when collecting antler or bone particles. Easily cleanable and fairly long lasting. Best used as a second (rear) stage behind a standard filter. About Razaire filters. There are 4 different filters available for the Razaire. While they work fine as single stage filters, they are best used in pairs (stacked). Adding an extra filter stage increases both the performance and the life of the filter, with little to no discernable drop in suction. All filters are approximately 9.75"x10.5"x2".