If you google "cork borers" or "cork borer set", lots of websites will
turn up that sell cork borer sets - they cost about $20, more or less.
With the right diameter cork borer, you will become independent of valve
bumper suppliers. You can make your own bumpers using cork, neoprene,
automobile tires, cheese, whatever you like. You will be the envy of
your section when you treat your colleagues to a lifetime supply of
corks for about $0.00.
But wait - there's more! You also can make protectors for glass table
tops, rubber washers, flute key pads, replacement erasers for your
mechanical pencils, tiny coasters for your kid's doll house cocktail
parties, more!
You will also need a cork borer sharpener, available at most cork borer
outlets. For example, see:
http://sciencelab.com/page/S/PVAR/10-G2627
David G.
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