A pair of professional copper/brass dowsing rods. These dowsing rods are probably the best you can buy. Very smooth and accurate.
The handles are approximately 10cm long (13.5cm overall) and have a diameter of 1cm.
The probes are 20.5cm long and have a diameter of 3mm.
Golden colour.
The probe section can be removed to allow for easier storage. To remove the probe you just unscrew the knob at the top of the handle and unscrew the rear section of the probe.
No guarantees as they seem to work better with some people than others. Practice makes perfect.