Nor-Cal's wire seal flanges are designed for use on bell jars, custom vacuum chambers and related systems. Standard sizes range from 12 to 27 inch nominal OD for tube sizes from 10 to 24 inch OD. A male and female flange compress a 0.080 inch diameter OFHC copper wire to effect a seal. Solid blanks are standard. Dished head blanks are offered as a lower cost alternative.