Do you have problems replacing rubber washers?

I used to find these things a problem. In order to get one of the right size, or at least close to it, the only option was to buy a pack with a dozen in it, eleven of which I would never use. There is however an easy way out of this.

Take one old cycle tyre inner tube or one old car inner tube, (next time you have new tyres fitted ask the garage if they have one)lay the old washer on it and draw around it, or use a compass and draw the circle size you need, and then cut the washer out with a pair of scissors. If you need a thick washer the car tyre inner tube is usually perfect and the cycle tyre inner tube for the thinner ones, but it is quite simple to cut up several to make up the required dimension.