Grounding arm for Aurora Rapid® 8 cm columns (for Bruker Column Toaster). Required for 8 cm Aurora Rapid® CSI columns with a Bruker Column Toaster in a Bruker CaptiveSpray or CaptiveSpray 2 source. This replaces the plastic grounding arm inside the Bruker Column Toaster and allows the earth connection to be established with the nanoZero®