This is a lure head from the Marine Fishing Technology Research Institute. Please specify one color from the three available. Weight: 42g, Total length: approximately 6cm. Available: G: 3 pieces GC: 4 pieces BG: 1 piece B: 5 pieces C: 4 pieces BC: 5 pieces I purchased these for trolling, but I'm selling them because I don't use them. I have multiple in stock, including different sizes, so bulk purchases are welcome.