1. 2 meter long PVC tube Fitted with a lid in each end – see photos on next pages Brass top, to fasten a rope, and to help fasten the hinge for the top lid Preferable with a weight here, makes it easier to lower it into the water.

2. Green color on drawing: PVC tube Ø 50 x4x1994 Brass frame (see photo). To use for fastening the rope, and to fasten the hinge of the top lid. Hinge The PVC tube is fastened to the brass frame with 4 screws Top part of the brass frame, for fastening the rope Top part of the tube:

3. The brass lid on top is here open.

4. Top part of the tube: The brass lid on top is here partly closed

5. Bottom part of the tube – see also photos on next pages.

6. Lid at the bottom of the tube.