Purchased to sync up newly rebuilt carburetors on my 1995 Honda Magna, they fit perfectly. This is a fairly inexpensive solution, they look like 1/4 inch OD copper tubing threaded with a nut and o-ring. I've found that the nut tries to cut into the copper tubing and then twists, so be careful; a washer between the nut and the o-ring may be useful.
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