Image KF Flex Formed Bellows Vacuum Fitting Product Options Part Number Flange Size Material DVF-A10GG KF10 304 Stainless Steel DVF-A16GG KF16 304 Stainless Steel DVF-A25GG KF25 304 Stainless Steel DVF-A40GG KF40 304 Stainless Steel DVF-A50GG KF50 304 Stainless Steel