"HORIZONTAL STABILIZERS,UPPER AND LOWER,FOR MG-40 STRUCTURES. USED ON LOW-IMPACT RESISTANCE STRUCTURES FOR LIGHTING SUPPORTS FOR AIRPORT APPROACHLIGHTING SYSTEMS,MODELS ALSF-2 AND MALSR. HORIZONTAL BRACE CLAMP 6-1/4 INCH ID BY 2 INCH HIGH WITH 3 EACH STABILIZING RODS SPACED AT 120 DEG. RODS FOR UPPER 1 FT 4-5/16 INCH LONG AND FOR LOWER 2 FT 2-9/16 INCH LONG. UNIT OF ISSUE,SET OF 2 (1 UPPER AND 1 LOWER. PER FAA SPEC. FAA-E-2702;ITEM 9, DRWG D-6155-1,ALSF-2 AND MALSR LIR STRUCTURES, STRUCTURAL CONFIGURATIONS"