Innovative and beautiful mini bell made of copper very loud and long lasting sound (100dB) body made of copper diameter 30 mm / 1,18 inch innovative assembly using 2 different fastening clamps 22.2 – 40 mm / 0,87 – 1,57 inch in diameter weight 48 g / 0,11 pounds incl. rubber inlay colour black For the assembly, only the upper screw is loosened with the help of an Allen key. Choose the appropriate fastening clamp and tighten everything again.