Flexible base plate for rails. For floor or wall mounting. Rail can be fixed with slot downwards or sideways. Part No. 661 3 200: suitable for WM15. Dlots at 90° to each other to simplify fixing. CO2 welded. With pre-assembled BIS RapidRail® Sliding nut(s) for a quick fixing, and retains assembly in place before final tightening. Material: metal parts made of steel 1.0332; spring(s) made of POM (polyoxymethylene), green. Zinc plated.