King Tester Hardness Bases for All Sized Test Pieces
C-1: 13 ½” Gap and 4" Throat
The C-1 standard base allows you to test any piece of metal or round with a maximum diameter of 8″.
C-5: 13 ½” Gap with 6” Throat
The C-5 allows you to test your wider pieces of metal, including pipes and other hard-to-test round pieces that are of a max diameter of 12 inches.
C-6: 20” Gap with 4” Throat
The C-6 is specially made to allow you to test taller pieces, such as pipes with large openings.
C-7: 20” Gap with 6” Throat
The C-7 base allows you to test your largest pieces of metal on the shop floor or in the field.