These male plug ends are rated up to 30 amp and 125 VAC, NEMA L5-30P Industrial Twist Lock Plug 2 Poles, have 3 wire socket and can be used as a cord end replacement for many vacuum pump applications. These can be used with Edwards RV3, RV5, RV8, RV12, and Varian DS102, DS202, DS302, DS402, DS602, and Alcatel Adixen 2005SD, 2010SD, 2015SD, 2021SD, 2005C1, 2010C1, 2015C1, 2021C1, 2010C2, 2015C2, 2021C2. The wall connector side is a NEMA L5-30P.