SPEEDWELL Earth Clamps are used to warn the openclose circuit of a earthing system. These are also used at the time of maintenance work. The label contains "SAFETY ELECTRICAL CONNEXON SIZE 12mm - 330mm, BS: 951 DO NOT REMOVE". It has a provision for attaching earthing cable terminal to the clamp. Label in other languages can be made to order Material: EC14 SS Strip, Brass Terminal, Screw with Anodized Al Label EC15 SS Strip, Bronze Terminal, Screw with Anodized Al Label