• The filter should be installed with eight corrugations to every foot of booth width. To facilitate cutting and positioning, the filter is marked at every eighth corrugation. Clip in one end, stretch across the frame, and clip in the other end - an operation taking less than one minute. If any short pieces are left over, they can be attached to a new length, either by a strip of masking tape or by stapling. NOTE: For easy removal of a "loaded" filter, apply a coating of grease to the frame before inserting the filter. Dimensions: 3 x 30 ft. Packing: One box of 3' x 30' filter material