The 25 foot grounded extension cords are sold by the case. They have lead free nickel-plated plug blades for a longer life and better electrical contact. This dark green Westinghouse heavy duty vinyl cord is made of single plug and for indoor-outdoor use with sturdy PVC connectors. They are rated to handle up to 13 amps and up to 1625 watts and is UL approved for 125 volts AC. Comes complete with instructions for the proper use.