G313217525,BICONCAVE LENS; N-BK 7; D=22.4;
G313330000,BICONCAVL.; FUSED SILICA; D=22.4
G313330322,BICONCAVE LENS; FUSED SILICA; D=
G313330329,BICONCAVE LENS; FUSED SILICA; D=
G313330525,BICONCAVE LENS; FUSED SILICA; D=
G313331000,BICONCAVE LENS; FUSED SILICA; D=
G313331322,BICONCAVE LENS; FUSED SILICA; D=
G313331329,BICONCAVE LENS; FUSED SILICA; D=
