G313333329,BICONCAVE LENS; FUSED SILICA; D=
G313333525,BICONCAVE LENS; FUSED SILICA; D=
G313373000,BICONCAVE LENS; N-BK 7; D=12.7;
G313373322,BICONCAVE LENS; N-BK 7; D=12.7;
G313373329,BICONCAVE LENS; N-BK 7; D=12.7;
G313373525,BICONCAVE LENS; N-BK 7; D=12.7;
G313374000,BICONCAVE LENS; N-BK 7; D=12.7;
G313374322,BICONCAVE LENS; N-BK 7; D=12.7;