This listing is for a (ONE) NEMA 5-15P 15A 125V 2 Pole 3 Wire Grounding Straight Blade Male Heavy Duty Nylon Plug.  These cULus Certified devices have features required by Electricians for performance and Safety.  Not all wiring devices are equal, look for UL Certification and features that provide value.  These Specification Grade plugs feature: 

• Superior nylon external cord grip to help prevent cord "Pull-Out"
• Ribbed nylon body stands up to abuse and provides ease of grip
• Wide cord range .300" - .655" (18/3 SJ through 12/3 S)
• Solid Brass blades, contacts and terminal screws
• Clear polycarbonate terminal cover allows visual inspection of conductors and terminations
• Terminal designations as well as strip gauge molded on terminal cover
• NEMA Designation, Amperage, Voltage and 3rd party Certification molded on face of device