Holder for Geiger-Muller Tube (with BNC connector).A square metal body 50mm x 40mm (length x depth) which houses the tube socket and is mounted on a sheet metal plate with rubber feet. A captive co-axial connecting lead 1M long is provided terminating in a standard BNC connector for connection to a radioactive counting device with compatible connector.A 2.2 MΩ protective stabilising resistor is internally wired in series with the anode connection.ZP1481 Geiger-Muller Tube is not included but can be purchased separately (B8A49724)