Sizes 1½”, 2”, 2½” and 4” (40, 50, 63, and 100 mm) Ranges (All ranges not stocked) Vacuum/Compound to 30 “Hg / 0/ 200 psi Pressure from 15 psi to 6,000 psi or other equivalent units of pressure or vacuum Pressure connection Material: copper alloy Lower mount (LM) 1/8” or 1/4” NPT