Got these propeller balancing rods back from the machine shop yesterday ! Cost was quite high because I only wanted 3 made to see what they would be like. But have spoken to them today and if anyone is interested in purchasing one, I can order a lot larger quantity I would be able to sell them for £13 each + postage which would be a genunie postage cost. (don't know price at this time) They are made of stainless steal left hand thread one end right hand the other marked black one end for the black prop silver the other. Any interest please email me at email@example.com Thanks. Glen.