The ISO-KF Tee is designed for ISO-KF vacuum systems that require a tee configuration for compact vacuum distribution and branching. Based on the product sheet image, the catalog lists the part in Stainless Steel 304 / 1.4301 and Stainless Steel 316L / 1.4404. The pressure range shown on the sheet differs by material: for Stainless Steel 304 / 1.4301, it is listed as 1 × 10⁻⁸ mbar to 500 mbar over pressure for elastomer seal and 1 × 10⁻⁹ mbar to 500 mbar over pressure for metal seal; for Stainless Steel 316L / 1.4404, it is listed as 1 × 10⁻⁸ mbar to 1.5 bar over pressure for elastomer seal and 1 × 10⁻⁹ mbar to 1.5 bar over pressure for metal seal.