In-line two-stage filter housing consisting of a model L114828 joined to different model without a mfg. Tag. Both are constructed of 16ga. Galvanized steel w/pre-drillled mounting flanges on both ends, aluminum glide rails, filter access doors w/seals on both sides, slot for 4" pre-filter. Housing measures 4' x 10' x 47 3/4"(thru housing).