Elesa+Ganter MPG. guide rail clamps Material Glass-fibre reinforced polyamide based (PA) technopolymer. Resistant to solvents, oils, greases and other chemical agents. Colour Black, matte finish. Standard executions AISI 304 stainless steel cylindrical head screws with hexagon socket, nickel-plated brass nuts. - MPG-C: for round guide. - MPG-T: for both the standard trapezoidal guides.