Elesa+Ganter TTA. Bearing heads 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: nut, M10 screw and washer in zinc-plated steel. - Execution SST: nut, M10 screw and washer in AISI 304 stainless steel