OEM metal bell size:D7.2x4cm,metal bell,gambling bell,alarm bell,plastic spraying,ICTI & ISO 9001. -Name of sample: Metal bell,gambling bell,alarm bell- Product Performance ... making with bright and beautiful colors and high qualityCharacter: perfect bell provides clear and long good soundUsing for School,office,restaurant ... ,also can be packed as per client's requests. call bell for OEM