This product is made of carbon tool steel infiltrated carbon steel and other wear-resistant materials. After good heat treatment, the hardness is HRG58 ° -62 °, and it has the characteristics of small deformation and high wear resistance,Plug gaugeThere are two types of structural forms, namely: cylindrical double headedPlug gaugeSingle head incomplete plug gauge, sheet plug gauge, etc. The production specifications range from φ 2-320, and can also be customized according to user drawings.