Charging rubber cap #T11, for Dogtra transmitters: 200NCP Gold (S/N greater than 111361), 202NCP (S/N greater than 101961), 280NCP, 282NCP, 1400NCP, 1500NCP, 1600NCP, 1700NCP, 1900NCP, 1902NCP, 7000 series, 7100 series, M Plus, and H Plus. Receivers: 175NCP (S/N greater than 103471), 200NCP Gold (S/N greater than 111361), 202NCP (S/N greater than 101961), 280NCP, 282NCP, 280C, 282C, ARC, 1400NCP, 1500NCP, 1600NCP, 1700NCP, 1800NC (S/N greater than 100121), 1802NC (S/N greater than 100101), 1803NC (S/N greater than 100101), 1804NC (S/N greater than 100126), 1900NCP, 1902NCP, 1900S, 1902S, 2200NCP, 2300NCP, 2302NCP, 2500T&B, 2502T&B, 3500NCP, 3502NCP, Edge RT, EF-3000 Gold, YS300, YS500 (S/N greater than 30320), 7000 series, 7100 series, M Plus, and H Plus. *Sold individually*