R&K K&R Rallye Map Measurer Flip up sighting prism 1:25,000, 1:50,000, 1:63,300 map scales Thermo elastic capsule for durable bubble free performance Cut outs for map marking Magnifying lens Plastic housing Rotating counter Precise metal measuring wheel Metric Scales: 1:15,000; 1:20,000; 1:25,000; 1:50,000; 1:100,000 Standard Scales: 1:24,000; 1:62,500, 1:250,000; inch ruler