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"What is the difference between two- and three-pronged plugs?"  01 April 2000.  HowStuffWorks.com. <http://electronics.howstuffworks.com/everyday-tech/question110.htm>  11 February 2012.
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Prices: Adapter Plugs

  • &quot;ABC Products&quot; - 12/3 Electrical Adapter ~ 3-prong Twist Plug to 3-prong Standard Outlet Plug(15 Amp Service - 9 inch Long)*
    "ABC Products" - 12/3 Electrical Adapter ~ 3-prong Twist Plug to 3-prong Standard Outlet Plug(15 Amp Service - 9 inch Long)*

    Heavy duty construction power cord adapter - Twist-to-lock to standard 3-prong outlet ~~ Power-on indicator light - Kink free cord ~~ 15A/12 gauge - extra heavy duty 12 gauge STW-A ~~ Can be

    $13.87

  • &quot;ABC Products&quot; - Century ~ 15 Amp. - 6 Outlet - Swivel Adapter - Plug in - 3-Prong Outlet (White Finish)
    "ABC Products" - Century ~ 15 Amp. - 6 Outlet - Swivel Adapter - Plug in - 3-Prong Outlet (White Finish)

    Heavy duty 3-prong electrical swivel adapter ~~ For conventuse, these outlets swivel in multiple directions ~~ Converts a standard 15A-125V duplex outlet into six (6} grounded outlets ~~ Can swivel 90 degree left. 45 degree off center, 90 degree right ~~ Made of heavy duty ASS plastic for fire retardant housing.

    $8.97

  • Gs20 3-prong American To European (2 Round) Wall Outlet Plug Adapter, 2-pack
    Gs20 3-prong American To European (2 Round) Wall Outlet Plug Adapter, 2-pack

    nbogroup Store 3-Prong American to 2-Prong (round) Wall Outlet Plug Adapter, 2-pack http://www.auctiva.com/stores/viewstore.aspx 3-prong American to 2-prong European (round) outlet plug adapter.Packaging: 2 per pack Note: Adapters do not convert electricity/voltage they only modify the pins for the electrical outlet We accept Paypal only, all payments should be received within 7 days after the purchase. We currently only ship to the customers in the US. For domestic shipping, we ship by UPS or

    $6.49

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