ISO80 (ISO-K) Series 
• High Vacuum Flange OD: Ø4.33" 
• Tube OD: 3.00" 
• ISO-K Claw Clamp Style 
 ISO80 High Vacuum Flange Equivalents: 
ISO-80, LF80, NW80, NW-80, Large Flange, ISO-LF 
 2-3/4" OD CF Conflat Flange: 
• 1.50" Tube OD 
• 6 Clearance (Thru) Holes 
• 0.265" Bolt Hole Diameter 
• Non-Rotatable 
 2.75" OD CF Conflat Flange (CFF) Equivalents 
275CF, CF35, CF38, CF40, CF275 
DN35CF, DN40CF, NW35CF 
**This Vacuum Essential Includes**
• Conical Reducer:  275xISO80-CR 
4-Aluminum Double Claw Clamps (ISO63-100-DC) 
1-Stainless/Viton Centering Ring 
(ISO80-300-SR-V) 
1-Bolt Kit (275-BK Series) 
10-Copper Gaskets 
(275-CG Series)