our gas discharge tube has got the TUV certification of German and SGS certification, satisfy the ROHS standard. ZM576 3R150F (with fail safe)ZM576 3R150B (with bend lead wire)ZM576 3R150BF (with bend lead wire and fail safe)ModelGas Discharge TubeType: ZM 576 3R 150L ZM 576 3R 150BFZM 576 2R 150LWith Lead WireZM 576 2R 150BFWith Lead Wire,Fail safeDimension ø5mmX7.6mmDiameter : 5mmLength: 7.6mm± ...