70 Watt HF Compression Driver (Tweeter) with 1 inch throat titanium diaphragm 
Max Power:  70W
RMS Power: 30W
Freq Response: 800Hz to 20KHz
Voice Coil: 35mm
Dims: 63 x 100mm

Also used extensively as replacement in several HF horn drivers such as QTX Sound QR12 (178.212UK), QR15 (178.213UK), QS12 (178.562UK), QS12A,  (178.565UK), QS15 (178.568UK) and QS15A