Confident fill the tank with a narrow neck to the desired level (for example, an automotive canister), if you equip the funnel with a special gauge. For its production will need a wire needle with a diameter of 1 mm, cork or foam float and a tin strip into the guide hole.
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SPACED AXIAL
To hold the centerline on the workpiece will help the device shown in the figure.
FOUNTAIN PEN PAPER
Simple and beautiful ball-point pen can be manufactured in a few minutes, if there is a rod with pasta and... a colourful illustration from a magazine or just a sheet of paper. For this...
