Description Soft and wide sealing rings filled with a unique combination of foam & liquid to offer optimum sealing & low pressure. High attenuation despite lightness and low profile: 35db SNR. Unique band design, stainless steel wire for constant pressure over long periods of use. Black cups. Conforms to EN352 Part 1. H=40, M=32, L=23, SNR=35. Weight 285g.