※ 304 is a symbol representing a type of stainless steel, and it has the same properties as surgical stainless steel. Material: Stainless steel Size: 40mm long Color: Gold Wire diameter: 0.7mm Ball part: 2mm Quantity: 30 pieces (+ spares) Since the wire diameter is 0.7mm, it has stiffness and is firm. The ball part is 2mm, which is large, so it is difficult to come off. [Note] Basically, for weighing purposes, we include 1-2 extra pieces. Also, some may be bent. (If it bothers you during your work, please use nylon pliers to smooth it out.) Please understand this beforehand. Because it is made overseas, there may be stains, misalignments, some defects, deformations, and size errors, so please consider purchasing with the understanding that these may occur (*μ_μ)♪