Elesa+Ganter GC. Connection joints Material Glass-fibre reinforced polyamide based (PA) technopolymer. Resistant to solvents, oils, greases and other chemical agents. Colour Black, matte finish. Clamping system - Execution A: nuts and M8 cylindrical-head screws with hexagon socket in zinc-plated steel. - Execution SST: nuts and M8 cylindrical-head screws with hexagon socket in AISI 304 stainless steel.