2008 - Volume #32, Issue #5, Page #10
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Magnetic Valve Stem Caps
The developers of SnapCapsÖ say their patent pending valve stem covers make it a lot easier to put air in tires. The snap-on magnetic covers replace "screw-on" dust caps.
  A steel ring screws onto an existing air valve, and the magnetic cap simply sticks to it. "In tests, SnapCaps have stayed in place at speeds..........


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2008 - Volume #32, Issue #5