These are specialised, very long, telescopic handles, for when sampling high up in trees or flight paths.
The telescopic handle is made from black laminate profiles sections of 110cm each, with a screw thread of M6. The M6 screw fits the standard net rings, as well as the 35cm sweep net. However great care must be taken to not use too much swinging force if using the sweep net.
An optional accessory to prevent the net ring starting to unscrew is the Safety against the angular rotation of the frame. It can be used on with this type of handle.
Available lengths (extended) of laminate handles is 300cm, 400cm, 500cm