Graticule. These are suitable for measurement of angles, linear dimensions, hole sizes and grid sizes depending upon the scale fitted. Each magnifier has a No. 2 scale fitted to the base of the acrylic drawtube as standard. Other scales (scales only), available separately, can be interchanged to give the required measurement, see scale No. 1 to 4 specifications. No.1 Scale RS ; 200-9431 200-9431 No.2 Scale RS ; 200-9447 200-9447 No.3 Scale RS ; 200-9453 200-9453 No.4 Scale RS ; 200-9469 200-9469