Ball stud: 1)In different sizes and different threads; 2)Steel, stainless steel; 3)Hardened or not hardened; 4)Finish: zinc, Ball stud:1)In different sizes and different threads;2)Steel, stainless steel;3)Hardened or not hardened;4)Finish: zinc, black coat. Ball studs for Gas Spring / Hood Support / Gas Strut / Air Spring / Gas Lift