Inner plugs for Cobra PC - with or without thread (M8).

ø25 mm: AC25-2 / AC25-2-G-M8
ø31 mm: AC31-2 / AC31-2-G-M8
ø38 mm: AC38-2 / AC38-2-G-M8
ø44 mm: AC44-2 / AC44-2-G-M8

Assemblies with 2-component glue (Araldit) and plugs for horizontal tubing/cross rails are fastened with special bolts.