This is a single replacement mounting block for a Seca 220 model stadiometer (not included). The black spacer mounting block is needed to mount the heightrod to a Seca scale (not included). Mounting screws are not included. Each mounting block is 3.5 inches by 2 inches by .75 inches.
Note: Spacer placement and installation varies with the Seca scale. First you attach the spacer to the rear (on models 700/711/712, on the scale front) of the column using two screws. Then you use the specialty screw to attach the measuring rod to the spacer. The measuring slide and the scale point away from the weighing platform on Seca models 709, 710, 709f and 710f and towards the weighing platform on all other models. The fixing hole location varies with the Seca scale to which you are attaching the stadiometer. Contact Seca directly for more information.