MKS ISO-KF Vacuum Flange Overpressure Ring, NW40, MKS 100316305 - A23006 Unused, new old stock, clean and in excellent condition. Ships same business day. Flange Size: NW40 Flange Type: ISO-KF Maximum Pressure: 100 PSIG Material: 304 Stainless Steel Width: 9mm Inner... MSRP: Was: Now: $7.14 Add to Cart