Specifications: It is easy to assemble and use, which is a professional tool kit for you. Made of high quality red copper material, it is durable, easy to use and has long service life. This product has great thermal conductivity and electrical conductivity. Type: Conductive Tips Material: Red Copper Quantity: 5Pcs/Set Diameter: M6/M8 Features: Durable, Easy to Use, Welding Tool Caliber: 0.8mm/0.03", 1.0mm/0.04", 1.2mm/0.05" (Approx.) Length: 24mm/27mm/30mm Package Includes: 5 x Conductive Tips