Manufactured from PVC and comprising seven stackable cones covering inside diameters from 5 to 286 mm. The measuring ranges are: 5–54 mm, 55–103 mm, 104–142 mm, 143–178 mm, 179–214 mm, 215–250 mm and 252–286 mm. Its modular configuration makes it easy to select only the required range and store the set in less space.