Material: 45# high-quality carbon structural steel.
1,The buliding material(coupler) can be used to link rebar whose
diamter is between 12mm and 40mm.
2,The tensile strength of the buliding material(coupler) can be 1.1
times of the steel bars'.
3,Especially, the exceed strength(special material) coupler's
tensile strength is more than 800Mpa.