"ITEM CONSISTS OF LENS, OPTICAL, 5 UNITS WITH P/N 34468-1, 34469-1, 34470-1, 34471-1, AND 34472-3; FILTER, LIGHT, 2 UNITS WITH P/N 34473-1, 34474-1; HOUSING, OPTICS, 1 UNIT WITH P/N 34466-13A; COVER, DESICCANT, MANIFOLD, 3 UNITS EACH WITH P/N 34460, 34461, AND 34462; COMPENSATOR, THERMAL, 2.1 UNITS WITH P/N 34486-1, 34487-1."