SW Sidewalk Box Home » Products » SW Sidewalk Box MIFAB® SW Series sidewalk boxes with 6 3/4” x 6 3/4” lacquered cast iron frame and ductile iron cover. (Specify SW6-4 for solid cover and SW6P-4 for perforated cover). Specification Sheet Catalog Catalog List Pricing Current Catalog: CLPB-2022 Return to Products