Elesa+Ganter LW.A vibration-damping levelling elements Base Zinc-plated steel. Vibration-damping disk Natural rubber NR, hardness 80 Shore A, black colour, matte finish. Levelling plate Zinc-plated steel. Packing ring OR in NBR synthetic rubber. Threaded stem Zinc-plated steel, supplied not assembled. Nut and washer Zinc-plated steel.