Support Rings Sets for Hardness Tester Scale

Support ring is one of accessories for hardness Tester. It is not included in the package.  Customers can buy it if he or she need. 

Package Includes: 

For hardness testing of cylindrical outside diameter surfaces such as pipe, this set includes:

Z 10-15 (for testing cylindrical OD with a 10 to 15 mm radius)
Z 14.5-30 (for testing cylindrical OD with a 14.5 to 30 mm radius)
Z 25-50 (for testing cylindrical OD with a 25 to 50 mm radius)

For hardness testing cylindrical inside diameter surfaces, this set includes:
HZ 11-13 (for testing cylindrical ID with an 11-13 mm radius)
HZ 12.5-17 (for testing cylindrical ID with a 12.5 to - 17 mm radius)
HZ 16.5-30 (for testing cylindrical ID with a 16.5 to - 30 mm radius)

For hardness testing spherical outside diameter surfaces, this set includes:
K 10-15 (for testing spherical OD with a 10 to 15 mm radius)
K 14.5-30 (for testing spherical OD with a 14.5 mm to 30 mm radius)

For hardness testing spherical inside diameter surfaces, this set includes:
HK 11-13 (for testing spherical ID with a 11 to 13 mm radius)
HK 12.5-17 (for testing spherical ID with a 12.5 to 17 mm radius)
HK 16.5-30 (for testing spherical ID with a 16.5 to 30 mm radius)