Origin: Mainland China Standard or Nonstandard: Standard Certification: NONE Material: Teflon Shape: Ring Gasket Model Number: Steel Mesh Tri Clamp–Gasket OD–Fit Pipe OD1.5″–50.5mm–38mm2″–64mm–51mm2.5″–77.5mm–63mm3″–91mm–76mm3.5″–106mm–89mm4″–119mm–102mm Mesh