Thread specifications : M6 M8 M10 M12 Length : 120 /150 /200 /250 /300mm Specification Eg : M6x120mm (Thread Diameter = 6mm; Length = 120mm) The data is for reference only, please prevail in kind! The product is made of high-strength carbon steel, and the zinc layer is added to the surface to make the product not only beautiful, but also to strengthen the rust-proof ability.