Clamping lever: Zinc die-cast, powder coated, silver metallic color
Insert and spacer bushing: Stainless steel, European Standard No. 1.4305 (American Standard Series No. 303)
GN 911 adjustable clamping lever kits are an option for use in place of DIN 912 cap screws in various tube clamping components.
See second table below for sizes that correspond to various components.