Access. f. SONOPULS HD 2070 and HD 2200 noise protection box LS 8, stainl. steel Noise protection box LS 8: Made of stainless steel. Attenuation 20 dB-AU. For direct acoustic irradiation with long sonotrodes (MS 72/73, KE 76), please also order spacer tube AH 6. With support rod, pivoting clamp device, and quick-acting clamp.