We offer a wide range of windows to suit our old range of CF1204, DN1704 and CCC cryostat. The following table will help you to select the suitable window for your optical cryostat.

Ordering information	Old style
Sizes	CF/DN series	CCC series
Outer	35 mm x 2 mm	35 mm x 2 mm
Middle	20 mm x 2 mm	20 mm x 2 mm
Inner(except KRS5)	12 mm x 2 mm	12 mm x 2 mm
Inner(KRS5)	10 mm x 2 mm	10 mm x 2 mm
Inner(sapphire to 500K)	12 mm x 2 mm	-
Spectrosil B quartz Outer Middle Inner	A9-003 A9-013 A9-023	A9-003 A9-013 A9-024
Spectrosil WF quartz Outer Middle Inner	A9-103 A9-113 A9-123	A9-103 A9-113 A9-124
Sapphire Outer Middle Inner(300K) Inner(500K) Copper gasket for sapphire inner(500K)	A9-203 A9-213 A9-223 A9-233 A9-243	A9-203 A9-213 A9-224 - -
Calcium fluoride Outer Middle	A9-303 A9-313	A9-303 A9-313
Aluminised mylar Outer Middle Inner	A9-323 A9-333 A9-343	A9-323 A9-333 A9-344
Clear mylar Outer Middle	A9-403 A9-413 A9-423	A9-403 A9-413 A9-424
Polythene Outer Middle Inner	A9-433 A9-443 A9-453	A9-433 A9-443 A9-454
Zinc Selenide Outer Middle Inner	A9-503 A9-513 A9-523	A9-503 A9-513 A9-524
KRS5 Outer Middle Inner	A9-534 A9-543 *	A9-534 A9-543 *
Polypropylene Outer Middle Inner	* * *	* * *
Blank Outer Middle Inner Inner(500K)	A9-603 A9-613 A9-623 A9-633	A9-603 - - -